Sheppard, Mullin etc. v. J-M Manufacturing Co., Inc. , 237 Cal. Rptr. 3d 424 ( 2018 )


Menu:
  • Filed 8/30/18
    IN THE SUPREME COURT OF CALIFORNIA
    SHEPPARD, MULLIN, RICHTER              )
    & HAMPTON, LLP,                        )
    )
    Plaintiff and Respondent,   )
    )                            S232946
    v.                          )
    )                      Ct.App. 2/4 B256314
    J-M MANUFACTURING COMPANY, INC., )
    )                     Los Angeles County
    Defendant and Appellant.    )                   Super. Ct. No. YC067332
    ______________________________________ )
    A large law firm agreed to represent a manufacturing company in a federal
    qui tam action brought on behalf of a number of public entities. During the same
    time period, the law firm represented one of these public entities in matters
    unrelated to the qui tam suit. Both clients had executed engagement agreements
    that purported to waive all such conflicts of interest, current or future, but the
    agreements did not specifically refer to any conflict and the law firm did not tell
    either client about its representation of the other. This arrangement fell apart when
    the public entity discovered the conflict and successfully moved to have the firm
    disqualified in the qui tam action. A fight over the manufacturer’s outstanding law
    firm bills followed, and the dispute was sent to arbitration in accordance with an
    arbitration clause in the parties’ engagement agreement.
    The arbitrators ruled in the law firm’s favor and the superior court
    confirmed the award, but the Court of Appeal reversed. That court concluded that
    1
    SEE CONCURRING AND DISSENTING OPINION
    the matter should never have been arbitrated because, notwithstanding the broad
    conflict waiver in the engagement agreement, the law firm’s undisclosed conflict
    of interest violated rule 3-310(C)(3) of the Rules of Professional Conduct. This
    ethical violation, the court ruled, rendered the parties’ agreement, including the
    arbitration clause, unenforceable in its entirety. The Court of Appeal further held
    that the conflict of interest disentitled the law firm from receiving any
    compensation for the work it performed for the manufacturer while also
    representing the utility district in other matters.
    We agree with the Court of Appeal that, under the framework established in
    Loving & Evans v. Blick (1949) 
    33 Cal. 2d 603
    , the law firm’s conflict of interest
    rendered the agreement with the manufacturer, including its arbitration clause,
    unenforceable as against public policy. Although the manufacturer signed a
    conflicts waiver, the waiver was not effective because the law firm failed to
    disclose a known conflict with a current client. But we conclude, contrary to the
    Court of Appeal, that the ethical violation does not categorically disentitle the law
    firm from recovering the value of the services it rendered to the manufacturer;
    whether principles of equity entitle the law firm to some measure of compensation
    is a matter for the trial court to address in the first instance.
    I.
    In 2006, a qui tam action was filed against J-M Manufacturing Company,
    Inc. (J-M), a pipe manufacturing company, in federal court in California. John
    Hendrix, the relator in the action, alleged that J-M had misrepresented the strength
    of polyvinyl chloride pipe it had sold to approximately 200 public entities around
    the country for use in their water and sewer systems. In early 2010, the complaint
    was unsealed, and many of these public entities intervened in the case.
    As these events were unfolding, J-M began to consider replacing the law firm
    that had been representing it in the action. In February 2010, shortly after the
    2
    complaint was unsealed, J-M’s general counsel, Camilla Eng, invited attorneys
    from the law firm of Sheppard, Mullin, Richter & Hampton, LLP (Sheppard
    Mullin), to discuss taking over the representation from the other law firm. The
    attorneys, Bryan Daly and Charles Kreindler, ran a conflicts check to determine
    whether Sheppard Mullin had represented any of the public entities identified as
    the real parties in interest in the qui tam action. The conflicts check revealed that
    another Sheppard Mullin attorney, Jeffrey Dinkin, had done employment-related
    work for a public entity intervener, South Tahoe Public Utility District (South
    Tahoe), on and off since at least 2002, and most recently in November 2009.
    South Tahoe had, however, signed an advance waiver of conflicts in cases
    unrelated to the employment matters on which Dinkin had provided assistance.
    After internal consultation, Sheppard Mullin’s general counsel opined that because
    of this advance conflict waiver, the firm could take on representation of J-M in the
    qui tam action.
    On March 4, 2010, Sheppard Mullin and J-M signed an engagement
    agreement. Under the heading “Scope of Representation,” the agreement recited
    that Sheppard Mullin was engaged to represent J-M in the qui tam action. The
    agreement provided that the representation would terminate on completion of the
    lawsuit and “any related claims and proceedings,” unless the law firm agreed
    separately to provide J-M other legal services. The agreement recited the terms of
    the representation, including payment of fees, and provided that these terms would
    also apply to other engagements for J-M that Sheppard Mullin might undertake,
    except as the parties otherwise agreed.
    The engagement agreement also contained a conflict waiver much like the
    one South Tahoe had signed. The waiver provision provided:
    “Conflicts with Other Clients. Sheppard, Mullin, Richter & Hampton LLP
    has many attorneys and multiple offices. We may currently or in the future
    3
    represent one or more other clients (including current, former, and future clients)
    in matters involving [J-M]. We undertake this engagement on the condition that
    we may represent another client in a matter in which we do not represent [J-M],
    even if the interests of the other client are adverse to [J-M] (including appearance
    on behalf of another client adverse to [J-M] in litigation or arbitration) and can
    also, if necessary, examine or cross-examine [J-M] personnel on behalf of that
    other client in such proceedings or in other proceedings to which [J-M] is not a
    party provided the other matter is not substantially related to our representation of
    [J-M] and in the course of representing [J-M] we have not obtained confidential
    information of [J-M] material to representation of the other client. By consenting
    to this arrangement, [J-M] is waiving our obligation of loyalty to it so long as we
    maintain confidentiality and adhere to the foregoing limitations. We seek this
    consent to allow our Firm to meet the needs of existing and future clients, to
    remain available to those other clients and to render legal services with vigor and
    competence. Also, if an attorney does not continue an engagement or must
    withdraw therefrom, the client may incur delay, prejudice or additional cost such
    as acquainting new counsel with the matter.”
    Although Eng revised certain portions of the engagement agreement before
    signing, she made no changes to the conflict waiver provision. Sheppard Mullin
    did not tell J-M about its representation of South Tahoe before or at the time the
    engagement agreement was signed.
    The engagement agreement also contained an arbitration clause, providing
    that any dispute over fees or charges that was not resolved through voluntary
    arbitration under the auspices of the California State Bar, and any other type of
    dispute between the parties, would be settled by “mandatory binding arbitration”
    conducted in accordance with the California Arbitration Act (CAA; Code Civ.
    4
    Proc., § 1282 et seq.). The arbitration clause also stated the agreement would be
    governed by California law.
    Dinkin, the Sheppard Mullin employment partner, again began actively
    working for South Tahoe later in March 2010, a few weeks after Sheppard Mullin
    began representing J-M. Over the course of the following year, Sheppard Mullin
    billed South Tahoe for about 12 hours of work. During this period, South Tahoe’s
    attorneys in the qui tam action became aware that Sheppard Mullin was now
    representing J-M in that action. In March 2011, South Tahoe’s attorneys in the qui
    tam action wrote to Sheppard Mullin asking for an explanation for the firm’s
    failure to inform South Tahoe of the adverse representation. Sheppard Mullin
    responded by reminding South Tahoe of its earlier conflicts waiver. Dissatisfied
    with this response, South Tahoe filed a motion to disqualify Sheppard Mullin in
    the qui tam proceeding.
    In July 2011, the district court granted the disqualification motion, ruling that
    Sheppard Mullin’s simultaneous representation of South Tahoe and J-M had been
    undertaken without adequately informed waivers in violation of rule 3-310(C)(3)
    of the Rules of Professional Conduct.
    During its representation of J-M, Sheppard Mullin performed approximately
    10,000 hours of work in the qui tam action and a related state court action.
    According to Sheppard Mullin attorney Kreindler, the firm’s billings totaled more
    than $3 million, of which more than $1 million remained unpaid.
    Sheppard Mullin sued J-M for the unpaid fees. J-M cross-complained for
    breach of contract, an accounting, breach of fiduciary duty, and fraudulent
    inducement; it also sought disgorgement of fees previously paid to Sheppard
    Mullin, as well as exemplary damages.
    Sheppard Mullin petitioned for an order compelling arbitration under Code of
    Civil Procedure section 1281.2. J-M opposed the order, asserting that Sheppard
    5
    Mullin’s conflict of interest had rendered the parties’ entire agreement illegal and
    unenforceable. Overruling J-M, the superior court granted the petition to compel
    arbitration.1
    The arbitrators ruled in Sheppard Mullin’s favor. They observed that “the
    better practice” would have been for the firm to disclose its representation of
    South Tahoe and seek J-M’s specific waiver of the conflict. But the arbitrators
    concluded that, even assuming Sheppard Mullin’s failure to disclose the conflict
    constituted an ethical violation, the violation was not sufficiently serious or
    egregious to warrant forfeiture or disgorgement. The arbitrators observed that
    Sheppard Mullin’s representation of South Tahoe involved matters unrelated to the
    qui tam action and that the conflict of interest had not caused J-M damage,
    prejudiced its defense of the qui tam action, resulted in communication of its
    confidential information to South Tahoe, or rendered Sheppard Mullin’s
    representation less effective or less valuable. The arbitrators awarded Sheppard
    Mullin more than $1.3 million in fees and interest.
    Sheppard Mullin petitioned the superior court to confirm the award, but J-M
    petitioned to vacate it, renewing its contention that the parties’ engagement
    agreement was illegal and unenforceable due to Sheppard Mullin’s simultaneous
    representation of adverse interests in violation of rule 3-310(C)(3) of the Rules of
    Professional Conduct. Again overruling J-M’s objection, the superior court
    confirmed the award. Citing Moncharsh v. Heily & Blase (1992) 
    3 Cal. 4th 1
    (Moncharsh), the court held that a violation of the Rules of Professional Conduct
    does not render a retainer agreement unenforceable. The court concluded that the
    arbitrators therefore did not exceed their powers in awarding the contractual fees.
    (Code Civ. Proc., § 1286.2, subd. (a)(4).)
    1     J-M petitioned the Court of Appeal for a writ of mandate, but the petition
    was summarily denied.
    6
    The Court of Appeal reversed. The court explained that California law,
    unlike federal law, treats a challenge to the legal enforceability of a contract as a
    matter for the court to decide, regardless of whether the contract contains an
    arbitration clause. The appellate court concluded that here, Sheppard Mullin’s
    concurrent representation of J-M and South Tahoe violated rule 3-310(C)(3) of the
    Rules of Professional Conduct, notwithstanding the scope of the conflict waivers
    in the parties’ respective engagement agreements. This violation, the court
    concluded, both rendered the engagement agreement with J-M unenforceable and
    disentitled Sheppard Mullin from any fees for representing J-M while it was
    simultaneously representing South Tahoe in other matters. For fee calculation
    purposes, the court remanded to the superior court to determine when precisely
    Sheppard Mullin’s representation of South Tahoe began.
    We granted Sheppard Mullin’s petition for review. The petition presents
    three questions: (1) whether a court may invalidate an arbitration award on the
    ground that the agreement containing the arbitration agreement violates the public
    policy of the state as expressed in the Rules of Professional Conduct, as opposed
    to statutory law; (2) whether Sheppard Mullin violated the Rules of Professional
    Conduct in view of the broad conflicts waiver signed by J-M; and (3) whether any
    such violation automatically disentitles Sheppard Mullin from any compensation
    for the work it performed on behalf of J-M. We consider each of these questions
    in turn.
    7
    II.
    The threshold question in the case concerns the proper scope of judicial
    review of the arbitrators’ award under the CAA.2 The CAA is “a comprehensive
    statutory scheme regulating private arbitration in this state.” 
    (Moncharsh, supra
    , 3
    Cal.4th at p. 9.) “Through this detailed statutory scheme, the Legislature has
    expressed a ‘strong public policy in favor of arbitration as a speedy and relatively
    inexpensive means of dispute resolution.’ ” (Ibid.) To effectuate that policy, the
    CAA provides that “[a] written agreement to submit to arbitration an existing
    controversy or a controversy thereafter arising is valid, enforceable and
    irrevocable, save upon such grounds as exist for the revocation of any contract.”
    (Code Civ. Proc., § 1281.) Where, as here, an arbitrator has issued an award, the
    decision is ordinarily final and thus “is not ordinarily reviewable for error by
    either the trial or appellate courts.” (Moncharsh, at p. 13.) The exceptions to this
    rule of finality are specified by statute. As relevant here, the CAA provides that a
    court may vacate an arbitration award when “[t]he arbitrators exceeded their
    powers and the award cannot be corrected without affecting the merits of the
    decision upon the controversy submitted.” (Code Civ. Proc., § 1286.2, subd.
    (a)(4) (section 1286.2(a)(4)).)
    In Loving & Evans v. 
    Blick, supra
    , 
    33 Cal. 2d 603
    (Loving & Evans), this
    court held that the excess-of-authority exception applies, and an arbitral award
    must be vacated, when a court determines that the arbitration has been undertaken
    to enforce a contract that is “illegal and against the public policy of the state.”
    2       As noted, the parties’ agreement calls for application of California law,
    including the CAA, and both parties agree that the CAA governs. This case thus
    presents no question concerning application of the Federal Arbitration Act, 9
    United States Code section 1 et seq. (See Volt Info. Sciences v. Leland Stanford
    Jr. U. (1989) 
    489 U.S. 468
    , 470; Cronus Investments, Inc. v. Concierge Services
    (2005) 
    35 Cal. 4th 376
    , 387.)
    8
    (Loving & Evans, at p. 610 (plur. opn. of Spence, J.); see 
    id. at p.
    615 (conc. opn.
    of Edmonds, J.).) Sheppard Mullin does not ask us to revisit that holding. It does,
    however, argue that the Loving & Evans illegality exception should apply only to
    contracts that are found to violate public policy as it has been declared by the
    Legislature. Because the Rules of Professional Conduct are not promulgated by
    the Legislature, Sheppard Mullin argues, a violation of the rules can afford no
    ground for vacating an arbitration award under section 1286.2(a)(4) of the CAA.
    We reject the argument.
    A.
    Under general principles of California contract law, a contract is unlawful,
    and therefore unenforceable, if it is “[c]ontrary to an express provision of law” or
    “[c]ontrary to the policy of express law, though not expressly prohibited.” (Civ.
    Code, § 1667.)
    While this court has recognized that “questions of public policy are primarily
    for the legislative department to determine,” we have also held that a contract or
    transaction may be found contrary to public policy even if the Legislature has not
    yet spoken to the issue. (Safeway Stores v. Retail Clerks etc. Assn. (1953) 
    41 Cal. 2d 567
    , 574 [“In cases without number the state courts have declared
    contracts, transactions and activities . . . to be contrary to public policy where their
    legislative departments have not spoken on the subject.”]; Green v. Ralee
    Engineering Co. (1998) 
    19 Cal. 4th 66
    , 82 [administrative regulations promulgated
    to effectuate statutory authority “may be manifestations of important public
    policy”].)
    As particularly relevant here, California courts have held that a contract or
    transaction involving attorneys may be declared unenforceable for violation of the
    Rules of Professional Conduct, the set of binding rules governing the ethical
    practice of law in the State of California. In Chambers v. Kay (2002) 
    29 Cal. 4th 9
    142 (Chambers), this court refused enforcement of a fee division agreement
    undertaken without written client consent, on the ground that the arrangement
    violated the Rules of Professional Conduct. We noted that the California State Bar
    is authorized by statute to formulate these rules, and they are adopted with the
    approval of this court. (Chambers, at p. 156; see Bus. & Prof. Code, §§ 6076–
    6077.) To enforce the fee division agreement, we observed, would be to
    countenance “a violation of a rule we formally approved in order ‘to protect the
    public and to promote respect and confidence in the legal profession.’ ”
    (Chambers, at p. 158, quoting Rules Prof. Conduct, rule 1–100(A).) It would be
    “absurd,” we concluded, for a court to aid an attorney in enforcing a transaction
    prohibited by the rules. (Chambers, at p. 161.) Both before and after Chambers,
    Courts of Appeal reached similar conclusions about similar fee splitting
    arrangements in violation of the Rules of Professional Conduct. As the court
    explained in Altschul v. Sayble (1978) 
    83 Cal. App. 3d 153
    , the rules “are not only
    ethical standards to guide the conduct of members of the bar; but they also serve
    as an expression of public policy to protect the public.” (Id. at p. 163; see 
    id. at pp.
    159–164; Kallen v. Delug (1984) 
    157 Cal. App. 3d 940
    , 948–951; Scolinos v.
    Kolts (1995) 
    37 Cal. App. 4th 635
    , 639–640; Margolin v. Shemaria (2000) 
    85 Cal. App. 4th 891
    , 901–903; McIntosh v. Mills (2004) 
    121 Cal. App. 4th 333
    , 344–
    346.) It follows that an attorney contract that has as its object conduct constituting
    a violation of the Rules of Professional Conduct is contrary to the public policy of
    this state and is therefore unenforceable.
    10
    B.
    The question Sheppard Mullin raises here is whether a different, more
    restrictive rule ought to apply when a court considers the lawfulness of a contract
    on review of an arbitrator’s decision, applying the illegality exception recognized
    in Loving & Evans.
    The specific question in Loving & Evans concerned the validity of an
    arbitration award granted to a group of unlicensed contractors feuding with a
    property owner. (Loving & 
    Evans, supra
    , 33 Cal.2d at pp. 604–605.) The
    superior court had confirmed the award without establishing that the contractors
    had at least substantially complied with the licensing statutes. We held this was
    error because to enforce the agreement of an unlicensed contractor would violate
    the public policy codified in statutes forbidding unlicensed persons from engaging
    in the contracting business and from recovering compensation for such business.
    (Id. at pp. 606–607, 613–614 (plur. opn. of Spence, J.); see 
    id. at p.
    615 (conc.
    opn. of Edmonds, J.).)
    We acknowledged that the merits of an arbitral award are not generally
    subject to judicial review, but explained that “the rules which give finality to the
    arbitrator’s determination of ordinary questions of fact or of law are inapplicable
    where the issue of illegality of the entire transaction is raised in a proceeding for
    the enforcement of the arbitrator’s award.” (Loving & 
    Evans, supra
    , 33 Cal.2d at
    p. 609.) Whether a contract is entirely illegal, and therefore unenforceable, is an
    issue “for judicial determination upon the evidence presented to the trial court, and
    any preliminary determination of legality by the arbitrator . . . should not be held
    to be binding upon the trial court.” (Ibid.) This is because “[t]he question of the
    validity of the basic contract [is] essentially a judicial question,” whether the
    question is raised in opposition to a petition to compel arbitration or in a
    postarbitration petition to vacate an arbitral award. (Id. at p. 610.) “If this were
    11
    not the rule,” we reasoned, “courts would be compelled to stultify themselves by
    lending their aid to the enforcement of contracts which have been declared by
    statute to be illegal and void. A party seeking confirmation cannot be permitted to
    rely upon the arbitrator’s conclusion of legality for the reason that paramount
    considerations of public policy require that this vital issue be committed to the
    court’s determination whenever judicial aid is sought.” (Id. at p. 614.)
    In the years since Loving & Evans was decided, this court has identified
    limits to this exception to arbitral finality, but the court has not questioned the
    continued validity of the exception itself.3 In Ericksen, Arbuthnot, McCarthy,
    3       Since Loving & Evans, the Courts of Appeal in several cases have applied
    the illegality exception in declining to confirm arbitration awards based on a
    judicial determination that the parties’ contract violated public policy and was
    therefore void and unenforceable in its entirety. (Lindenstadt v. Staff Builders,
    Inc. (1997) 
    55 Cal. App. 4th 882
    , 892–893 [whether unlicensed person acted as real
    estate broker is for court to determine, not arbitrator]; All Points Traders, Inc. v.
    Barrington Associates (1989) 
    211 Cal. App. 3d 723
    , 737 [where arbitrator made
    award to unlicensed person who allegedly acted as a real estate broker in violation
    of statute, “the issue of illegality is one for judicial determination upon the
    evidence presented to the trial court”]; Green v. Mt. Diablo Hospital Dist. (1989)
    
    207 Cal. App. 3d 63
    , 66, 71–73 [allegations that hospital district’s buy-out
    agreement with executive constituted illegal gift of public funds, illegal payment
    of extra compensation, etc., constituted claims of illegality voiding entire contract
    and were subject to judicial determination; trial court properly denied petition to
    compel arbitration]; Bianco v. Superior Court (1968) 
    265 Cal. App. 2d 126
    , 129–
    130 [applying rule to claim that oil drilling contract was unenforceable because the
    parties failed to obtain the required drilling permits; petition to compel arbitration
    should have been denied]; see also Epic Medical Management, LLC v. Paquette
    (2015) 
    244 Cal. App. 4th 504
    , 512 [stating rule that “[w]hen it is alleged that the
    contract in its entirety is illegal, the issue is reviewable,” but finding rule
    inapplicable because allegedly illegal transactions were only an incidental part of
    parties’ contractual arrangement]; Ahdout v. Hekmatjah (2013) 
    213 Cal. App. 4th 21
    , 36 [in case involving unlicensed person acting as contractor, distinguishing
    Loving & Evans on ground that claim of illegality went to only one provision of
    broad development agreement]; Cotchett, Pitre & McCarthy v. Universal Paragon
    Corp. (2010) 
    187 Cal. App. 4th 1405
    , 1417, fn. 1 [noting entire-illegality principle
    but declining to address it in view of lack of illegality].)
    12
    Kearney & Walsh, Inc. v. 100 Oak Street (1983) 
    35 Cal. 3d 312
    (Ericksen), we
    considered whether a party is entitled to avoid arbitration pursuant to a contractual
    arbitration clause when the party alleges it was fraudulently induced to enter into
    the contract. We answered the question in the negative, concluding that the
    agreement to arbitrate was severable from the remainder of the contract, and the
    question of whether the contract (as opposed to the agreement to arbitrate) had
    been fraudulently induced was thus a matter for the arbitrator to consider in the
    first instance. (Id. at pp. 317–320, citing, inter alia, Prima Paint v. Flood &
    Conklin (1967) 
    388 U.S. 395
    [reaching same conclusion in case of alleged
    fraudulent inducement].) We also considered “the practical consequences of a rule
    which would allow a party to avoid an arbitration commitment” merely by
    pleading that the other party never intended to fulfill its contractual obligations.
    
    (Ericksen, supra
    , at pp. 322–323.) In holding such a fraud claim did not preclude
    arbitration, we distinguished Loving & Evans and other cases in which “the issue
    of illegality of the contract has been raised.” (Ericksen, at p. 316, fn. 2.) We
    explained that while “[q]uestions of public policy which are implicated by an
    illegal agreement . . . might be ill-suited for arbitral determination,” the same is
    not true of “garden-variety ‘fraud in the inducement’ ” claims “related to
    performance failure.” (Id. at p. 317, fn. 2.) The latter sort of claims, we
    explained, are, by contrast, “ideally suited for the arbitrator’s expert
    determination.” (Ibid.)
    Later, in 
    Moncharsh, supra
    , 
    3 Cal. 4th 1
    , we considered whether the claimed
    illegality of a provision of a contract (as opposed to the entirety of the contract)
    constitutes grounds for vacating an arbitral award. In that case, an attorney and
    law firm executed an employment agreement that, among other things, provided
    for the remittance of a substantial percentage of future fees to the law firm if the
    attorney left and took clients with him. When the attorney did just that, the firm
    13
    demanded its contractual share, and the attorney refused. The parties submitted
    the ensuing dispute to an arbitrator in accordance with the arbitration clause of the
    employment agreement. (Id. at pp. 6–7.) In the arbitration proceedings, the
    attorney argued that the fee sharing clause was unenforceable because it violated
    the Rules of Professional Conduct and case law on entitlement to fees from a
    former client, but the arbitrator rejected the argument. The attorney sought
    judicial review of the merits of that ruling through a petition to vacate or modify
    the award under Code of Civil Procedure section 1286.2, citing Loving & Evans in
    support of his claim for judicial review. (Moncharsh, at pp. 7–8, 31.)
    This court rejected the argument. Loving & Evans, we emphasized,
    concerned a claim that the contract was illegal not just in part, but in whole.
    
    (Moncharsh, supra
    , 3 Cal.4th at pp. 31–32.) The distinction mattered, we
    explained, because the CAA calls for the enforcement of an arbitration agreement
    unless there are grounds for revoking that agreement. (Moncharsh, at p. 29; see
    Code Civ. Proc., § 1281.2.) “If a contract includes an arbitration agreement, and
    grounds exist to revoke the entire contract, such grounds would also vitiate the
    arbitration agreement. Thus, if an otherwise enforceable arbitration agreement is
    contained in an illegal contract, a party may avoid arbitration altogether.”
    (Moncharsh, at p. 29, italics added.)4 But when, as in Moncharsh itself, “the
    alleged illegality goes to only a portion of the contract (that does not include the
    arbitration agreement), the entire controversy, including the issue of illegality,
    remains arbitrable.” (Id. at p. 30.) We accordingly rejected the suggestion that
    4      Despite its broad phrasing, Moncharsh did not purport to overrule 
    Ericksen, supra
    , 35 Cal.3d at pages 316 to 317, footnote 2, 322 to 323, in which we had
    taken the view that fraudulent inducement in the making of the contract, as
    distinguished from illegality, is not a ground for vitiating an arbitration agreement
    contained therein.
    14
    judicial review of an arbitrator’s decision is routinely available in such cases. (Id.
    at p. 32, fn. 14.)
    In the portion of Moncharsh on which Sheppard Mullin relies most heavily,
    we went on to observe “that there may be some limited and exceptional
    circumstances justifying judicial review of an arbitrator’s decision when a party
    claims illegality affects only a portion of the underlying contract. Such cases
    would include those in which granting finality to an arbitrator’s decision would be
    inconsistent with the protection of a party’s statutory rights.” 
    (Moncharsh, supra
    ,
    3 Cal.4th at p. 32, citing Shearson/American Express Inc. v. McMahon (1987) 
    482 U.S. 220
    , 225–227.) In light of the legislative policy in favor of arbitral finality,
    however, we counseled that courts should be reluctant to invalidate an award on
    such a ground “[w]ithout an explicit legislative expression of public policy.”
    (Moncharsh, at p. 32, italics added.) “Absent a clear expression of illegality or
    public policy undermining” the statutory presumption favoring private arbitration
    and the finality of arbitral awards, “an arbitral award should ordinarily stand
    immune from judicial scrutiny.” (Ibid.) The particular ethical rules the attorney
    had cited were inadequate for this purpose, we held, as the rules said nothing to
    suggest arbitration was inappropriate to resolve what was “essentially an ordinary
    fee dispute.” (Id. at p. 33.)
    Sheppard Mullin seizes on the reference to an “explicit legislative expression
    of public policy” in this passage to argue that judicial review of the arbitral award
    in this case should be limited to whether the parties’ agreement violates a statute
    or comparable declaration of the Legislature. But the language on which
    Sheppard Mullin relies is not fairly read as a general caution against reliance on
    nonlegislative expressions of public policy in considering the enforceability of
    contracts containing arbitration agreements. The passage was concerned with a
    different subject: when, notwithstanding a valid and enforceable arbitration
    15
    agreement, an arbitrator’s resolution of a particular issue should be subject to
    judicial review for legal error. The court noted that such review might be
    warranted when “granting finality to an arbitrator’s decision would be inconsistent
    with the protection of a party’s statutory rights,” but it advised courts to be wary
    of such claims in the absence of a clear expression of statutory policy.
    (Moncharsh, 3 Cal.4th at p. 32, italics added; see also 
    id. at p.
    33 [“[T]he normal
    rule of limited judicial review may not be avoided by a claim that a provision of
    the contract, construed or applied by the arbitrator, is ‘illegal,’ except in rare cases
    when according finality to the arbitrator’s decision would be incompatible with the
    protection of a statutory right.”].) Moncharsh did not suggest, much less hold, that
    a court presented with a claim that an entire contract or transaction is void for
    illegality is limited to considering only those expressions of public policy that are
    contained in legislative enactments.
    Sheppard Mullin argues that it makes no sense to distinguish for these
    purposes between claims of partial contractual illegality and complete illegality; in
    either case, it argues, the legislative policy favoring contractual arbitration should
    yield only when the contract violates public policy as the Legislature has declared
    it. But ever since Loving & Evans—whose continued validity Sheppard Mullin
    has not questioned—California cases have made clear that the legislative policy
    favoring contractual arbitration, and the finality of arbitral awards, applies only
    when there is, in fact, a valid contract to arbitrate. (Loving & 
    Evans, supra
    , 33
    Cal.2d at p. 610.) And as we said in Moncharsh, while a claim that a single
    provision of a contract is illegal ordinarily has no bearing on the validity of the
    parties’ agreement to arbitrate, the same is not true of a claim that the entire
    contract is void for illegality. In such cases, we have said, the agreement to
    arbitrate cannot be severed from the remainder, and a court is not bound to
    16
    confirm the results of an arbitration conducted under such a contract. 
    (Moncharsh, supra
    , 3 Cal.4th at p. 29.)
    Sheppard Mullin also makes much of the fact that Loving & Evans itself
    concerned a claim of illegality premised on violation of statutory law, and
    references to the nature of the claim are scattered throughout the opinion. (E.g.,
    Loving & 
    Evans, supra
    , 33 Cal.2d at p. 604 [the arbitration award could not “be
    reconciled with the settled public policy of this state as expressed in our statutory
    law”]; 
    id. at p.
    612 [confirming the arbitration award “would be tantamount to
    giving judicial approval to acts which are declared unlawful by statute”].)
    Subsequent cases applying the Loving & Evans illegality exception have involved
    similar scenarios. (E.g., All Points Traders, Inc. v. Barrington 
    Associates, supra
    ,
    211 Cal.App.3d at p. 737 [unlicensed person allegedly acted as a real estate broker
    in violation of statute].)5 But the logic of these cases is not so limited. As we
    have since explained, the basic premise of Loving & Evans is that an agreement to
    arbitrate is invalid and unenforceable if it is made as part of a contract that is
    invalid and unenforceable because it violates public policy. 
    (Moncharsh, supra
    , 3
    Cal.4th at p. 29; Loving & Evans, at p. 610; accord, Richey v. AutoNation, Inc.
    (2015) 
    60 Cal. 4th 909
    , 917 [notwithstanding general rules of arbitral finality,
    “judicial review may be warranted when a party claims that an arbitrator has
    enforced an entire contract or transaction that is illegal”].) And as noted,
    California law holds that a contract may be held invalid and unenforceable on
    5      Green v. Mt. Diablo Hospital 
    Dist., supra
    , 207 Cal.App.3d at pages 71 to
    73, applied the rule to an agreement made in violation of both statutory and
    constitutional limits on public agencies. The court in Bianco v. Superior 
    Court, supra
    , 265 Cal.App.2d at pages 129 to 130, did not specify the source of the law
    requiring the parties to acquire drilling permits; whether it was a statute or a
    regulation is thus unclear.
    17
    public policy grounds even though the public policy is not enshrined in a
    legislative enactment.
    C.
    Sheppard Mullin warns that failure to adopt a legislative policy limitation
    will invite a flood of litigation by parties disappointed by arbitration results.
    Courts will be mired in difficult line-drawing exercises to determine what sort of
    contracts violate public policy and which do not. The problem will be particularly
    acute in the context of attorney-service contracts, Sheppard Mullin says, because
    the Rules of Professional Conduct govern so many aspects of the attorney-client
    relationship. And to resolve these claims, courts will be regularly called on to
    resolve highly factual disputes, thereby eliminating the advantages of arbitration.
    But by declining to adopt Sheppard Mullin’s legislative policy limitation on
    the illegality exception, we are hardly breaking new ground. We merely affirm
    that, under Loving & Evans, the legality of a contract that contains an arbitration
    agreement is to be judged by the same standards as a contract without such an
    agreement. And we repeat that those standards do not encompass claims of mere
    partial illegality; the case law does not establish, nor do we today hold, that an
    attorney-services contract may be declared illegal in its entirety simply because it
    contains a provision that conflicts with an attorney’s obligations under the Rules
    of Professional Conduct. As Moncharsh illustrates, the violation of an ethical rule
    in one portion of a contract (there a fee-splitting provision) does not necessarily
    preclude enforcement of the contract as a whole. 
    (Moncharsh, supra
    , 3 Cal.4th at
    p. 30; see also Civ. Code, § 1599 [contract with “several distinct objects” may be
    void as to an unlawful one and valid as to a lawful one]; Birbrower, Montalbano,
    Condon & Frank v. Superior Court (1998) 
    17 Cal. 4th 119
    , 137–139 [when
    attorney-service contract was valid as to services performed in New York and
    invalid as to those performed in California, the valid part would be severed from
    18
    the remainder, allowing law firm to seek contractual fees for New York work];
    Calvert v. Stoner (1948) 
    33 Cal. 2d 97
    , 103–105 [invalid provision in fee
    agreement prevented client from settling without lawyer’s consent; it was held
    severable from the lawful compensation provisions, which remained enforceable].)
    It is only when “the illegality taints the entire contract” that courts may declare
    “the entire transaction is illegal and unenforceable.” (Keene v. Harling (1964) 
    61 Cal. 2d 318
    , 321.)
    With this background in mind, we turn to the question whether the claimed
    violation in this case constitutes grounds for revocation of the entire contract.
    III.
    J-M argues, and the Court of Appeal agreed, that the engagement agreement
    at issue is unenforceable because it violated rule 3-310(C)(3) of the Rules of
    Professional Conduct (rule 3-310(C)(3)). That rule provides that an attorney
    “shall not, without the informed written consent of each client . . . [¶] . . . [¶] . . .
    [r]epresent a client in a matter and at the same time in a separate matter accept as a
    client a person or entity whose interest in the first matter is adverse to the client in
    the first matter.” (Ibid.) “Simply put,” without informed written consent, “an
    attorney (and his or her firm) cannot simultaneously represent a client in one
    matter while representing another party suing that same client in another matter.”
    (Certain Underwriters at Lloyd’s London v. Argonaut Ins. Co. (N.D.Cal. 2003)
    
    264 F. Supp. 2d 914
    , 919.) This general prohibition applies even if “the
    simultaneous representations may have nothing in common.” (Flatt v. Superior
    Court (1994) 
    9 Cal. 4th 275
    , 284 (Flatt).) “ ‘Informed written consent’ ” is defined
    to mean “written agreement to the representation following written disclosure,”
    and “[d]isclosure” is defined as “informing the client . . . of the relevant
    circumstances and of the actual and reasonably foreseeable adverse consequences
    to the client . . . .” (Rules Prof. Conduct, rule 3-310(A)(2), (1).)
    19
    Sheppard Mullin does not dispute that its concurrent representation of J-M
    and South Tahoe came within the scope of rule 3-310(C)(3), but maintains that it
    obtained J-M’s informed consent to that representation by means of the conflict
    waiver provision of the parties’ engagement agreement. We conclude that
    Sheppard Mullin’s concurrent representation of J-M and South Tahoe violated rule
    3-310(C)(3) and rendered the engagement agreement between Sheppard Mullin
    and J-M unenforceable. Our conclusion rests on three subsidiary points: First, at
    the time Sheppard Mullin agreed to represent J-M in the qui tam action, the law
    firm also represented a client with conflicting interests, South Tahoe; second,
    because Sheppard Mullin knew of that conflicting interest and failed to inform
    J-M of it, J-M’s consent was not “informed” within the meaning of the Rules of
    Professional Conduct; and third, Sheppard Mullin’s unconsented-to conflict of
    interest affected the whole of its engagement agreement with J-M, rendering it
    unenforceable in its entirety.
    A.
    In their engagement agreement, Sheppard Mullin asked J-M to agree to the
    law firm’s representation of any other client, “currently or in the future,” in
    matters not substantially related to its representation of J-M, “even if the interests
    of the other client are adverse” to J-M’s. The conflict waiver clause alerted J-M
    that Sheppard Mullin is a large firm with many offices and attorneys and may
    represent clients whose interests conflict with J-M’s, but it did not disclose any
    particular conflict, or even any area of potential conflict, and did not mention
    Sheppard Mullin’s concurrent representation of South Tahoe.
    The parties and amici curiae debate at length whether a general advisement of
    this type is adequate to obtain a client’s informed consent to the possibility of
    future conflicts with a law firm’s future clients. But J-M argues that this debate is
    beside the point, because when it hired Sheppard Mullin to represent it in the qui
    20
    tam action, the firm’s representation of South Tahoe was not merely a future
    possibility; it was a present reality. Sheppard Mullin disputes the premise,
    asserting that when the firm took on J-M’s representation on March 4, 2010, South
    Tahoe was a former client (or, to borrow a term used at oral argument, a
    “dormant” client) and did not become a current client again until March 29, when
    Dinkin began new employment work for the agency. But based on the terms of
    Sheppard Mullin’s engagement agreement with South Tahoe, as well as the
    undisputed facts concerning their course of dealing, we agree with J-M: Sheppard
    Mullin and South Tahoe had an attorney-client relationship at the time Sheppard
    Mullin took on J-M, South Tahoe’s adversary, as a client.
    South Tahoe’s operative engagement agreement, executed in 2006, provided
    that Sheppard Mullin would represent the utility district “in connection with
    general employment matters (the ‘Matter’).” The agreement further provided that
    South Tahoe could terminate the representation at any time, as could Sheppard
    Mullin (subject to its ethical obligations), but that otherwise the representation
    would terminate “upon completion of the Matter” unless the firm agreed to render
    other legal services to the agency. The parties’ agreement thus established an
    attorney-client relationship that, absent earlier termination by one of the parties,
    would endure so long as Sheppard Mullin continued to work on “the Matter,”
    which was defined in the agreement as “general employment matters.”
    Dinkin had performed employment work for South Tahoe in November 2009
    and did so again beginning on March 29, 2010. Overall, Dinkin had provided
    South Tahoe legal services as a Sheppard Mullin partner since 2002, and the firm
    billed the utility district for 119 hours of work in the five years before May 2011.
    As of March 4, 2010, then, Sheppard Mullin’s work on “general employment
    matters” was ongoing. There is no evidence either party terminated the
    engagement until South Tahoe did so in 2011, after it discovered the firm’s
    21
    conflict of interest. It follows that Sheppard Mullin was still South Tahoe’s
    attorney in March 2010, when it also began representing J-M.
    This conclusion finds support in a substantial body of case law from both
    within and without California. Under comparable circumstances, where a law
    firm and client have had a long-term course of business calling for occasional
    work on discrete assignments, courts have generally held the fact that the firm is
    not performing any assignment on a particular date and may not have done so for
    some months—or even years—does not necessarily mean the attorney-client
    relationship has been terminated. In International Business Machines Corp. v.
    Levin (3d Cir. 1978) 
    579 F.2d 271
    , 281, for example, the court found a continuous
    attorney-client relationship existing at the time a law firm took on adverse
    representation even though the law firm “had no specific assignment from IBM on
    hand on the day the antitrust complaint was filed and even though [the law firm]
    performed services for IBM on a fee for service basis rather than pursuant to a
    retainer arrangement.” As the court explained, “the pattern of repeated retainers,
    both before and after the filing of the complaint, supports the finding of a
    continuous relationship.” (Ibid.; see also, e.g., M’Guinness v. Johnson (2015) 
    243 Cal. App. 4th 602
    , 616–617 [several-month gap following completion of last
    assignment did not terminate attorney-client relationship]; Kabi Pharmacia AB v.
    Alcon Surgical, Inc. (D.Del. 1992) 
    803 F. Supp. 957
    , 962 [allegedly “ ‘sporadic’ ”
    nature of firm’s work, and “lull” in such work at time of adverse representation,
    does not support finding there was no ongoing attorney-client relationship]; SWS
    Financial Fund A v. Salomon Bros. Inc. (N.D.Ill. 1992) 
    790 F. Supp. 1392
    , 1395,
    1399 [continuing relationship found where firm had billed client for 214 hours
    over a 13-month period on a number of discrete projects, the last ending two
    months before firm began adverse representation]; Manoir–Electroalloys Corp. v.
    Amalloy Corp. (D.N.J. 1989) 
    711 F. Supp. 188
    , 193–195 [individual was law
    22
    firm’s current client in 1988, even though firm had last performed work for
    individual in 1983 to 1984, where the two had a long-standing arrangement
    involving legal work on a number of matters].) The central question is whether
    the client would reasonably understand that the representation has terminated (see
    Rest.3d Law Governing Lawyers, § 31, com. h, p. 223; 
    id., § 18),
    and courts are
    properly reluctant to impose on a client the burden of discerning that a law firm
    that has done periodic work for it has ceased to be the client’s attorney, simply by
    lapse of time.
    Sheppard Mullin contends its agreement with South Tahoe was a
    “framework” agreement under which the relationship would be renewed, on the
    same terms, each time the client had a new assignment for the firm—and,
    critically, one that would end when the assignment was completed. (See Banning
    Ranch Conservancy v. Superior Court (2011) 
    193 Cal. App. 4th 903
    , 913 (Banning
    Ranch) [framework agreement between law firm and client created “a structure for
    establishing future attorney-client relationships on an ‘as-requested’ basis by the
    [client], and subject to confirmation by the . . . firm,” but “ ‘did not create an
    attorney-client relationship absent an actual request, and acceptance, for
    representation on a particular matter’ ”].) The terms of the agreement do not,
    however, bear out the characterization. The agreement provided that Sheppard
    Mullin’s representation of South Tahoe would continue for the length of “the
    Matter,” which the agreement defined as general employment matters, in the
    plural. The definition belies the suggestion that the parties intended to terminate
    the attorney-client relationship after each individual general employment matter
    was completed. And unlike the framework agreement at issue in Banning Ranch,
    the agreement contained no language reserving to the law firm the right to decline
    work requested by the client. Nor did the agreement include any other explicit
    statement that Sheppard Mullin and South Tahoe would maintain an attorney-
    23
    client relationship only during times when the law firm was actually performing
    work for the utility district.
    While the South Tahoe engagement agreement was not what the Banning
    Ranch court called a “[c]lassic retainer agreement[]” (Banning 
    Ranch, supra
    , 193
    Cal.App.4th at p. 917)—there was no retainer fee involved—it was not a simple
    framework agreement, either. It was, rather, an agreement governing a continuing
    engagement involving occasional work on employment matters as needed. And
    under that agreement, over the course of a decade Sheppard Mullin regularly
    advised and assisted South Tahoe with employment matters. (Cf. Banning Ranch,
    at p. 915 [law firm performed minimal work for client under agreement].) Absent
    any express agreement severing the relationship during periods of inactivity, South
    Tahoe could reasonably have believed that it continued to enjoy an attorney-client
    relationship with its longtime law firm even when no project was ongoing. (See
    Manoir–Electroalloys Corp. v. Amalloy 
    Corp., supra
    , 711 F.Supp. at p. 194 [client
    could reasonably “construe [attorney’s] actions as the actions of attorneys vis-à-vis
    their present client”].)
    B.
    As noted, J-M consented to waive current conflicts, as well as future ones.
    The waiver thus, by its terms, covers the conflict with South Tahoe. We must
    therefore consider whether the waiver constituted effective consent to Sheppard
    Mullin’s concurrent representation of adverse interests.
    The limitations in rule 3-310(C)(3) serve to enforce “the attorney’s duty—
    and the client’s legitimate expectation—of loyalty, rather than confidentiality.”
    
    (Flatt, supra
    , 9 Cal.4th at p. 284.) It is for this reason that the rules encompass
    simultaneous representation even in unrelated matters where there is no risk that
    confidential information will be transmitted. (Ibid.) The purpose of these rules,
    we have explained, “is evident, even (or perhaps especially) to the nonattorney. A
    24
    client who learns that his or her lawyer is also representing a litigation adversary,
    even with respect to a matter wholly unrelated to the one for which counsel was
    retained, cannot long be expected to sustain the level of confidence and trust in
    counsel that is one of the foundations of the professional relationship.” (Id. at
    p. 285; accord, People ex rel. Dept. of Corporations v. SpeeDee Oil Change
    Systems, Inc. (1999) 
    20 Cal. 4th 1135
    , 1147; Jeffry v. Pounds (1977) 
    67 Cal. App. 3d 6
    , 10–11 (Jeffry).)
    Because rule 3-310(C)(3) embodies a core aspect of the duty of loyalty, the
    disclosure required for informed consent to dual representation must also be
    measured by a standard of loyalty. To be informed, the client’s consent to dual
    representation must be based on disclosure of all material facts the attorney knows
    and can reveal. (See, e.g., Image Technical Services, Inc. v. Eastman Kodak Co.
    (N.D.Cal. 1993) 
    820 F. Supp. 1212
    , 1214–1215, 1217 [law firm failed to obtain
    informed consent to a conflict of interest because it did not disclose known
    material details of the conflict].) An attorney or law firm that knowingly
    withholds material information about a conflict has not earned the confidence and
    trust the rule is designed to protect.
    Assessed by this standard, the conflicts waiver here was inadequate. By
    asking J-M to waive current conflicts as well as future ones, Sheppard Mullin did
    put J-M on notice that a current conflict might exist. But by failing to disclose to
    J-M the fact that a current conflict actually existed, the law firm failed to disclose
    to its client all the “relevant circumstances” within its knowledge relating to its
    representation of J-M. (Rules Prof. Conduct, rule 3-310(A)(1).)
    Sheppard Mullin contends the blanket disclosure and waiver was sufficient in
    light of J-M’s size and sophistication and the participation of J-M’s own general
    counsel in the engagement negotiations. It cites a federal disqualification case
    from Texas, Galderma Laboratories v. Actavis Mid Atlantic LLC (N.D.Tex. 2013)
    25
    
    927 F. Supp. 2d 390
    (Galderma), for support. In that case, Galderma, a large
    corporation with global operations, engaged a law firm to help it with employee
    benefits matters, signing (by its general counsel) a blanket waiver of conflicts for
    the law firm. (Id. at p. 393.) One of the firm’s other clients, Actavis, was later
    named a defendant in an intellectual property suit brought by Galderma, and the
    firm represented Actavis in that litigation. When Galderma learned of the law
    firm’s adverse concurrent representation, it sought to disqualify the firm in the
    intellectual property action. (Id. at p. 394.)
    The district court denied disqualification. The court applied the American
    Bar Association Model Rules of Professional Conduct (hereinafter the Model
    Rules), which require informed consent to concurrent representation of adverse
    interests (a more lenient Texas rule did not). 
    (Galderma, supra
    , 927 F.Supp.2d at
    pp. 395–396.) Relying on a comment to rule 1.7 of the Model Rules to the effect
    that a general waiver may be effective where the client is an experienced user of
    legal services represented by independent counsel, the district court found the law
    firm’s blanket waiver form effective to obtain informed consent from Galderma, a
    large corporation represented by its own general counsel. (Id. at pp. 396–397,
    399–406.)6
    Galderma is inapposite. As an initial matter, whether or not the district court
    in that case correctly interpreted and applied the Model Rules, California has not
    6       Rule 1.7(b)(4) of the Model Rules permits concurrent representation of
    adverse parties with each client’s informed consent, confirmed in writing.
    Comment 22 to the rule, addressing consent to a future conflict, notes that a
    “general and open-ended” consent will ordinarily be ineffective but may suffice
    “if the client is an experienced user of the legal services involved,” particularly if
    the client is independently represented when giving consent.
    26
    adopted those rules or, more importantly, the comments to them.7 But even more
    to the point, Sheppard Mullin’s blanket waiver would not be effective in this case
    even under Galderma’s approach, because here the law firm failed to disclose a
    known, existing conflict before soliciting J-M’s consent. On this point, the
    Galderma court was clear: “If a conflict of interest is known to an attorney at the
    time he seeks a waiver, the attorney is not allowed to hide that conflict, regardless
    of whether the client is sophisticated or not.” 
    (Galderma, supra
    , 927 F.Supp.2d at
    pp. 402–403.) We agree. Whether the client is an individual or a multinational
    corporation with a large law department, the duty of loyalty demands an attorney
    or law firm provide the client all material information in the attorney or firm’s
    possession. No matter how large and sophisticated, a prospective client does not
    have access to a law firm’s list of other clients, and cannot check for itself whether
    the firm represents adverse parties. Nor can it evaluate for itself the risk that it
    may be deprived, via motion for disqualification, of its counsel of choice, as
    happened here. In any event, clients should not have to investigate their attorneys.
    7       On May 10, 2018, this court approved comprehensive amendments to the
    Rules of Professional Conduct, to take effect November 1, 2018. As part of this
    revision, current rule 3-310 will be replaced by a new provision governing
    conflicts of interest involving current clients, rule 1.7, which does take some of its
    language from rule 1.7 of the Model Rules. Like the current rule 3-310, new rule
    1.7 will require informed written consent for concurrent representation of adverse
    interests. But in approving this rule, we did not adopt the comment to rule 1.7(a)
    of the Model Rules upon which the Galderma court relied. We instead noted that
    the client’s experience and sophistication and the presence of independent
    representation in connection with the consent are “relevant” to the effectiveness of
    that consent, and that the new rule “does not preclude an informed written
    consent[] to a future conflict in compliance with applicable case law.” (Rules
    Prof. Conduct, rule 1.7, com. 9, eff. Nov. 1, 2018  [as of
    Aug. 30, 2018]. All Internet citations in this opinion are archived by year, docket
    number, and case name at .)
    27
    Simply put, withholding available information about a known, existing conflict is
    not consistent with informed consent.8
    Because this case concerns the failure to disclose a current conflict, we have
    no occasion here to decide whether, or under what circumstances, a blanket
    advance waiver like the one at issue in Galderma would be permissible.9 We
    conclude, rather, that without full disclosure of existing conflicts known to the
    attorney, the client’s consent is not informed for purposes of our ethics rules.
    Sheppard Mullin failed to make such full disclosure here.
    C.
    Sheppard Mullin argues that even if it failed to secure adequate consent to the
    dual representation of J-M in the qui tam action, the ethical violation does not
    invalidate the entire engagement agreement because the agreement encompassed
    other matters as well. But as noted, the object of the agreement was representation
    in the qui tam action. The agreement states that Sheppard Mullin is engaged to
    represent J-M “in connection with the lawsuit filed by Qui Tam plaintiff John
    8      We recognize that client confidentiality may, in some cases, limit what a
    law firm may tell one client about its representation of another. As noted in a
    comment to rule 1.7 of the Model Rules, if one client “refuses to consent to the
    disclosure necessary to permit the other client to make an informed decision, the
    lawyer cannot properly ask the latter to consent.” (Model Rules, rule 1.7, com. 19;
    see also Rules Prof. Conduct, rule 1.7, com. 7, eff. Nov. 1, 2018
     [as of Aug. 30, 2018].)
    9      Several federal courts applying California law have declined to enforce
    blanket advance waivers on grounds they insufficiently disclosed the conflicts of
    interest. (Lennar Mare Island, LLC v. Steadfast Ins. Co. (E.D.Cal. 2015) 
    105 F. Supp. 3d 1100
    , 1115, 1118; Western Sugar Coop. v. Archer-Daniels-Midland
    Co. (C.D.Cal. 2015) 
    98 F. Supp. 3d 1074
    , 1083–1084; Concat LP v. Unilever, PLC
    (N.D.Cal. 2004) 
    350 F. Supp. 2d 796
    , 801, 819–821.) Because we deal here with
    disclosure and waiver of a known existing conflict, we do not decide whether these
    decisions are correct.
    28
    Hendrix.” The agreement further states that the representation will terminate upon
    completion of that action and any related proceedings. The only reference to work
    outside that scope is a general statement that, except as the parties otherwise agree,
    the agreement’s terms will also apply to “other engagements for [J-M] that
    [Sheppard Mullin] may undertake.” (Italics added.) And while the agreement
    states that certain provisions on responding to possible third party document
    requests survive termination of the representation, those provisions were not
    independent of the qui tam representation but dependent on it. They do not
    change the fact that the agreement was one for representation in the qui tam
    action, a representation that violated rule 3-310(C)(3).10
    As explained in part II, ante, violation of a Rule of Professional Conduct in
    the formation of a contract can render the contract unenforceable as against public
    policy. That is what happened here when Sheppard Mullin agreed to represent
    J-M in the qui tam action, while also representing South Tahoe on other matters,
    without obtaining J-M’s informed consent. It is true that Sheppard Mullin
    rendered J-M substantial legal services pursuant to the agreement, and J-M has not
    endeavored to show that it suffered damages as a result of the law firm’s conflict
    of interest. But the fact remains that the agreement itself is contrary to the public
    policy of the state. The transaction was entered under terms that undermined an
    ethical rule designed for the protection of the client as well as for the preservation
    of public confidence in the legal profession. The contract is for that reason
    10      At oral argument, counsel for Sheppard Mullin offered a different argument
    for treating the conflict as relating only to a portion of the parties’ agreement: The
    agreement encompassed not only representation in the qui tam action, but also
    representation in a state court action to which South Tahoe was not a party. The
    engagement agreement itself, however, makes clear that its object was
    representation in the qui tam action. In any event, Sheppard Mullin did not
    include this argument or supporting reasoning in its briefs, and we decline to
    address an argument cursorily raised for the first time at oral argument.
    29
    unenforceable. (See 
    Chambers, supra
    , 29 Cal.4th at p. 159 [refusing to enforce
    fee-sharing agreement reached without client’s written consent, even though client
    was informed of agreement and referring attorney performed substantial legal
    services]; Altschul v. 
    Sayble, supra
    , 83 Cal.App.3d at p. 164 [fee-sharing
    agreement reached without client’s written consent would be void as contrary to
    public policy even if referring attorney performed some legal services].)
    IV.
    Because Sheppard Mullin’s ethical breach renders the engagement agreement
    unenforceable in its entirety, the rule of Loving & Evans means that Sheppard
    Mullin is not entitled to the benefit of the arbitrators’ decision awarding it unpaid
    contractual fees. The final question before us is whether Sheppard Mullin may
    receive any compensation for its services at all.
    As an alternative to contractual recovery, Sheppard Mullin has sought
    recovery under the equitable doctrine of quantum meruit—a doctrine that has
    sometimes been applied to allow attorneys “to recover the reasonable value of
    their legal services from their clients when their fee agreements are found to be
    invalid or unenforceable.” (Huskinson & Brown v. Wolf (2004) 
    32 Cal. 4th 453
    ,
    462 (Huskinson), citing cases; see Rest.3d Law Governing Lawyers, supra,
    § 39.)11 The Court of Appeal, however, held that Sheppard Mullin’s conflict of
    interest disentitles it from either receiving or retaining any compensation for the
    approximately 10,000 hours it worked on the qui tam matter, even on a theory of
    quantum meruit. Relying on a series of California cases in which courts denied
    11      “Quantum meruit refers to the well-established principle that ‘the law
    implies a promise to pay for services performed under circumstances disclosing
    that they were not gratuitously rendered.’ [Citation.] To recover in quantum
    meruit, a party need not prove the existence of a contract [citations], but it must
    show the circumstances were such that ‘the services were rendered under some
    understanding or expectation of both parties that compensation therefor was to be
    made.’ ” 
    (Huskinson, supra
    , 32 Cal.4th at p. 458.)
    30
    compensation in the face of serious ethical breaches, the Court of Appeal held that
    an attorney may never recover compensation for services rendered while it labored
    under an improperly waived conflict of interest. (See Fair v. Bakhtiari (2011) 
    195 Cal. App. 4th 1135
    ; 
    Jeffry, supra
    , 
    67 Cal. App. 3d 6
    ; Goldstein v. Lees (1975) 
    46 Cal. App. 3d 614
    (Goldstein).)
    Sheppard Mullin contends that not every attorney conflict of interest
    precludes quantum meruit recovery of unpaid fees, much less requires
    disgorgement of fees already paid. And here, it argues, the circumstances do not
    warrant the denial of fees. The firm asserts that, as the arbitrators found, its
    attorneys acted in good faith reliance on the blanket conflict waivers both clients
    signed. There is no claim that Sheppard Mullin ever worked against J-M’s interest
    in any matter, and no evidence suggests a breach of confidentiality. And finally,
    Sheppard Mullin emphasizes that J-M stipulated in the arbitration proceedings that
    it was not challenging the “value or [] quality” of Sheppard Mullin’s work on the
    qui tam action or seeking “transition costs” incurred in replacing the disqualified
    firm.12 Under the circumstances, Sheppard Mullin argues, denying all
    compensation for the extensive legal services the firm rendered in the qui tam
    action would impose a greatly disproportionate penalty and give J-M a massive
    windfall.
    The ultimate question whether Sheppard Mullin is entitled to any
    compensation at all is not ripe for our resolution. Because the superior court
    ordered the matter to arbitration before determining whether the parties had an
    enforceable contract and refused to review the merits of the arbitral award after it
    12      In the stipulation, however, J-M reserved the right to present evidence of
    the ethical violation and to argue that because of it Sheppard Mullin was not
    entitled to any fees.
    31
    was made, it has yet to consider any of the noncontract issues framed by the
    parties’ pleadings.13 Our holding today will reposition the parties where they
    were before the case took its unwarranted detour to arbitration, giving them an
    opportunity to litigate their noncontract claims. In order to clarify the scope of
    issues remaining for resolution, however, we address the portion of the Court of
    Appeal’s decision categorically barring recovery. We conclude, contrary to the
    Court of Appeal, that California law does not establish a bright-line rule barring all
    compensation for services performed subject to an improperly waived conflict of
    interest, no matter the circumstances surrounding the violation.
    Like the Court of Appeal, we begin by considering the rule described in
    section 37 of the Restatement Third of Law Governing Lawyers: “A lawyer
    engaging in clear and serious violation of duty to a client may be required to
    forfeit some or all of the lawyer’s compensation for the matter.” (See also 
    id., § 39,
    com. e, p. 288 [where fee contract is unenforceable, attorney may recover in
    quantum meruit “unless the lawyer’s conduct warrants fee forfeiture under § 37”].)
    An actual conflict of interest, the Court of Appeal reasoned, is always a serious
    violation, and so always bars any compensation. But while every violation of
    attorney conflict of interest rules is indeed serious to some degree, the rule
    described in the Restatement—which in turn derives from general principles of
    agency law—is not so categorical. The Restatement instructs, and we agree, that
    the egregiousness of the attorney’s conduct, its potential and actual effect on the
    client and the attorney-client relationship, and the existence of alternative
    13     In its complaint, Sheppard Mullin pleaded a cause of action for quantum
    meruit; J-M cross-complained for breach of fiduciary duty and fraudulent
    inducement and prayed for exemplary damages as well as disgorgement of the fees
    already paid. These claims have not been tried, nor have they been tested by
    means of a motion for summary judgment.
    32
    remedies are all also relevant to whether and to what extent forfeiture of
    compensation is warranted. (See 
    id., § 37.)
         The law takes these case-specific factors into account because forfeiture of
    compensation is, in the end, an equitable remedy. As California courts have often
    noted, the rule governing attorney forfeiture derives primarily from the general
    principle of equity that a fiduciary’s breach of trust undermines the value of his or
    her services. (Cal Pak Delivery, Inc. v. United Parcel Service, Inc. (1997) 
    52 Cal. App. 4th 1
    , 14, fn. 2 (Cal Pak); Schaefer v. Berinstein (1960) 
    180 Cal. App. 2d 107
    , 135, disapproved on other grounds in Jefferson v. J.E. French Co. (1960) 
    54 Cal. 2d 717
    , 719; accord, Kidney Association of Oregon v. Ferguson (1992) 
    315 Or. 135
    , 144 [
    843 P.2d 442
    ] [“When a court reduces or denies attorney fees as a
    consequence of a lawyer’s breach of fiduciary duty, it is a reflection of the limited
    value that a client receives from the services of an unfaithful lawyer.”].) “The
    remedy of fee forfeiture presupposes that a lawyer’s clear and serious violation of
    a duty to a client destroys or severely impairs the client-lawyer relationship and
    thereby the justification of the lawyer’s claim to compensation.” (Rest.3d Law
    Governing Lawyers, supra, § 37, com. b, p. 272.) Forfeiture also serves as a
    deterrent to misconduct, and it avoids putting clients to the task of proving the
    harm stemming from the lawyer’s conflict of interest when the extent of the harm
    may be difficult to measure. (Ibid.)
    The degree to which forfeiture is warranted as an equitable remedy will
    necessarily vary with the equities of the case. The commentary to the Restatement
    thus recognizes that while an attorney’s “flagrant” breach of his or her duty to a
    client may justify a complete forfeiture even without proof of harm to the client
    (Rest.3d Law Governing Lawyers, supra, § 37, com. d, p. 273), in other, less
    egregious cases complete forfeiture “would sometimes be an excessive sanction,
    giving a windfall to a client” (id., com. b, p. 272). As our sister court has
    33
    explained, a rule of automatic and complete forfeiture “for every breach of
    fiduciary duty, or even every serious breach, would deprive the remedy of its
    equitable nature and would disserve its purpose of protecting relationships of
    trust.” (Burrow v. Arce (Tex. 1999) 
    997 S.W.2d 229
    , 241; see also 
    id. at p.
    242,
    fn. 45 [collecting state cases taking similarly flexible approach].)
    When a law firm seeks compensation in quantum meruit for legal services
    performed under the cloud of an unwaived (or improperly waived) conflict, the
    firm may, in some circumstances, be able to show that the conduct was not willful,
    and its departure from ethical rules was not so severe or harmful as to render its
    legal services of little or no value to the client. Where some value remains, the
    attorney or law firm may attempt to show what that value is in light of the harm
    done to the client and to the relationship of trust between attorney and client.
    Apprised of these facts, the trial court must then exercise its discretion to fashion a
    remedy that awards the attorney as much, or as little, as equity warrants, while
    preserving incentives to scrupulously adhere to the Rules of Professional Conduct.
    The Court of Appeal decisions on which J-M relies do not persuade us to
    adopt a more categorical rule. In 
    Jeffry, supra
    , 67 Cal.App.3d at pages 8 to 9, a
    law firm represented a client in a personal injury matter while, through a different
    attorney, also representing the client’s wife against the client in their marital
    dissolution case, without the client’s knowledge or consent. After an unconflicted
    attorney substituted into the personal injury matter and obtained a recovery for the
    client, the firm sought and was awarded the reasonable value of its services.
    (Ibid.) On appeal, the client argued that “an attorney should be barred from
    recovering a fee when the client has discharged him for accepting employment
    hostile to the client’s interests” (
    id. at p.
    9) and the appellate court agreed,
    criticizing the law firm’s “uninhibited acceptance of a lawsuit against a current
    client” (
    id. at p.
    11) and denying the firm any compensation for services rendered
    34
    after its ethical breach (
    id. at p.
    12). The court’s holding was not surprising, given
    the facts: the law firm had decided to represent the client’s wife in a lawsuit
    against him, without making any effort to obtain his consent. But the court did not
    purport to craft a rule to govern all other breaches, nor did it offer any reasoning to
    support such a categorical rule.
    The same is true of Cal 
    Pak, supra
    , 
    52 Cal. App. 4th 1
    , in which the trial court
    disqualified an attorney and disallowed compensation after he proposed to drop
    his clients’ claims in exchange for several million dollars, to be paid directly to the
    attorney. (Id. at pp. 6–8.) The Court of Appeal ruled that the trial court “clearly
    did not abuse its discretion,” at least insofar as it denied compensation for work
    performed after this “colossal misdeed.” (Id. at pp. 16, 13; see also 
    id. at p.
    13
    [“here the trial court faced a direct, acknowledged, undisputed and indefensible
    betrayal by counsel of the interests of his client and the putative class”].) In so
    ruling, the court did recite a “general rule in conflict of interest cases that where an
    attorney violates his or her ethical duties to the client, the attorney is not entitled to
    a fee for his or her services” (
    id. at p.
    14), but it also observed that the same cases
    point to the possibility of some fees being recoverable in certain circumstances (
    id. at p.
    16). The court ultimately upheld the trial court’s ruling in pertinent part
    without relying on any absolute rule denying all compensation for attorneys who
    act under a conflict of interest, no matter the nature and consequences of the
    breach.14
    
    14 Day v
    . Rosenthal (1985) 
    170 Cal. App. 3d 1125
    involved a similarly
    egregious breach of duty. The attorney there had cheated Doris Day and her
    husband out of millions of dollars, while ostensibly representing them as attorney
    and business manager. (Id. at pp. 1133–1134.) The case, as the trial court
    described it, “ ‘ooze[d] with attorney-client conflicts’ ” and “ ‘reek[ed]’ ” of
    violations of the Rules of Professional Conduct. (Id. at pp. 1134, 1135.) After
    reviewing the misconduct in detail, the appellate court rejected the attorney’s
    35
    J-M also relies on 
    Goldstein, supra
    , 
    46 Cal. App. 3d 614
    , in which an attorney
    had served first as a corporation’s general counsel, then as counsel for a corporate
    director waging a proxy battle for control of the company. The Court of Appeal
    held the latter representation was subject to a conflict of interest, rendering the
    contract for that representation unenforceable. (Id. at pp. 617, 623–624.) The
    court went on to conclude, without any supportive reasoning, that the attorney’s
    firm was barred from any noncontractual recovery for his services: “Technically,
    of course, this action is not brought upon the contract, but is brought for services
    rendered pursuant to the contract. Needless to say, this distinction does not call
    for a different result.” (Id. at p. 624, fn. 11.) Goldstein’s unexamined
    conclusion—needless to say—holds little persuasive value. (Compare Rest.3d
    Law Governing Lawyers, § 
    37, supra
    , com. a, p. 271 [noting that even when an
    attorney’s contract is rendered unenforceable by misconduct, the lawyer may in
    some cases recover the fair value of services rendered].)15
    complaint that the trial court failed to determine the value of his services,
    explaining that the trial court in fact “found that the reasonable value of all his
    services was zero” (
    id. at p.
    1163) and, in any event, “[h]is conflicts of interest
    rendered his services valueless and required no finding on the[ir] reasonable
    value” (
    id. at p.
    1162).
    15      The concurring and dissenting opinion (post, at p. 11) notes that Goldstein
    and Jeffry cited this court’s decision in Clark v. Millsap (1926) 
    197 Cal. 765
    , 785,
    in which we upheld a trial court’s award of only a partial fee “upon a
    consideration of conflicting evidence which involves the unraveling of
    transactions intermingled with fictitious and fraudulent acts.” We explained that
    “a court may refuse to allow an attorney any sum as an attorney’s fee if his
    relations with his client are tainted with fraud” or other improper acts
    “ ‘inconsistent with the character of the profession.’ ” (Ibid.) Here, the trial court
    has not yet determined whether Sheppard Mullin’s violation of the Rules of
    Professional Conduct constituted fraud or whether it was in other respects so
    inconsistent with the character of the legal profession as to justify complete
    forfeiture of compensation.
    36
    Finally, J-M relies on Fair v. 
    Bakhtiari, supra
    , 
    195 Cal. App. 4th 1135
    (Fair),
    but Fair is not reasonably read to establish a categorical rule barring all recovery
    in cases of conflict of interest. In Fair, the trial court denied quantum meruit
    recovery to an attorney who had entered into extensive real estate investments
    with a client without giving the client advisements required by the Rules of
    Professional Conduct. (Id. at pp. 1142–1144, 1146.) On appeal, the court
    observed that services burdened by a conflict of interest between attorney and
    client have often been held to be without value. But it explained that “ ‘[w]here
    the entire contract is prohibited by statute or public policy, recovery in quantum
    meruit based on the reasonable value of services performed may or may not be
    allowed.’ ” (Id. at p. 1150.) The Court of Appeal concluded that the trial court
    had not abused its discretion in disallowing quantum meruit recovery under the
    circumstances of the case because the court “could well determine” that the
    attorney’s conduct was “fundamentally at war” with both ethical rules and
    statutory law and that it “infected the entire relationship” between the attorney and
    his clients. (Id. at p. 1169.)
    As Fair itself acknowledged, other California cases have explained that
    quantum meruit recovery may indeed be available in cases of conflict of interest,
    depending on the circumstances. 
    (Fair, supra
    , 195 Cal.App.4th, at p. 1161.)
    Pringle v. La Chapelle (1999) 
    73 Cal. App. 4th 1000
    , involved a claim that an
    attorney who represented both a corporation and individuals with interests adverse
    to the corporation failed to obtain valid waivers of the conflict and was therefore
    entitled to no fees for her services to one of the individual clients. (Id. at p. 1005.)
    The appellate court agreed with the individual client that “an attorney’s breach of
    a rule of professional conduct may negate an attorney’s claim for fees,” but noted
    the absence of any cited case holding that it “automatically” does so. (Id. at
    pp. 1005, 1006, italics added.) On the minimal record the client had provided, the
    37
    Court of Appeal could not “ascertain if the purported violation of the rules was
    serious, if any act was inconsistent with the character of the profession, or if there
    was an irreconcilable conflict” (
    id. at p.
    1006), and therefore affirmed the
    judgment awarding the attorney her fees. (Id. at p. 1007; see also Mardirossian &
    Associates, Inc. v. Ersoff (2007) 
    153 Cal. App. 4th 257
    , 279 [affirming trial court’s
    award of compensation in quantum meruit on assumption that attorney violated
    rule 3-310 of the Rules of Professional Conduct, where asserted ethical violation
    was not “particularly egregious” and where complaining client had not shown
    prejudice]; Sullivan v. Dorsa (2005) 
    128 Cal. App. 4th 947
    , 965–966 [whether
    violation of rules on representation of adverse interests was serious enough to
    compel forfeiture of fees is a question primarily for the trial court’s factfinding
    and discretionary judgment].)
    The Court of Appeal also looked for support to this court’s decision in
    
    Huskinson, supra
    , 
    32 Cal. 4th 453
    , but Huskinson does not mandate application of
    a categorical bar on compensation in all cases involving the ethical conflicts rules.
    In Huskinson, two law firms violated the Rules of Professional Conduct by
    agreeing between them to divide the prospective fee in a contingency case without
    obtaining the client’s informed written consent; one firm later sued the other for its
    agreed share of the fee. (Id. at pp. 456–457.) We held that while the plaintiff firm
    could not recover on the contract, which was unenforceable, it could recover the
    reasonable value of its services under a claim for quantum meruit. We reasoned
    that the ethical rule requiring disclosure to the client did not bar either the
    representation or the receipt of compensation. We further reasoned that allowing a
    quantum meruit recovery, which would be smaller than the agreed fee division,
    would not undermine the ethical rule’s policy because attorneys would still have a
    strong incentive to comply in order to receive their full fee. (Id. at pp. 459–460,
    463.)
    38
    In the portion of Huskinson on which the Court of Appeal relied, we
    distinguished two cases in which courts had disallowed quantum meruit recovery
    to attorneys who committed ethical violations, 
    Jeffry, supra
    , 
    67 Cal. App. 3d 6
    , and
    
    Goldstein, supra
    , 
    46 Cal. App. 3d 614
    , explaining that those cases “involved
    violations of a rule that proscribed the very conduct for which compensation was
    sought, i.e., the rule prohibiting attorneys from engaging in conflicting
    representation or accepting professional employment adverse to the interests of a
    client or former client without the written consent of both parties.” 
    (Huskinson, supra
    , 32 Cal.4th at p. 463.) But we had no occasion in Huskinson to consider
    whether an unwaived conflict of interest, standing alone, always requires the
    denial of compensation. The issue was not presented there and so we did not
    decide it.16
    16      The concurring and dissenting opinion (post, at pp. 23–24) also invokes
    Thomson v. Call (1985) 
    38 Cal. 3d 633
    (Thomson), in which a city council
    member’s sale of real estate to the city was found to have violated Government
    Code section 1090’s ban on self-dealing by public employees. We upheld a
    judgment requiring the defendant to return the entire purchase price, even though
    the city was permitted to retain the property. (Thomson, at pp. 646–652.)
    Thomson is distinguishable both procedurally and substantively. Whereas
    the superior court there had held a trial and tailored a remedy appropriate to the
    facts and equities 
    (Thomson, supra
    , 38 Cal.3d at pp. 643–644), here there has been
    no trial and no such opportunity for the superior court to consider the most
    appropriate remedy. And while we noted the trial court’s remedy in that case was
    “consistent with a long, clearly established line of cases” denying all recovery for
    transactions made in violation of Government Code section 1090 (Thomson, at
    p. 647), precedent in the area of attorney rule violations points to a more
    fact-dependent inquiry into the egregiousness of the attorney’s ethical violation, its
    effect on the value of the work to the client, and other possible injuries to the
    client. (See, e.g., Cal 
    Pak, supra
    , 52 Cal.App.4th at pp. 15–16; Rest.3d Law
    Governing Lawyers, supra, § 37.) The difference between these approaches
    reflects a difference in the nature of the conflicts at issue—a Government Code
    section 1090 violation inheres in the very fact of the official’s interest in the
    transaction, and cannot be avoided by full disclosure (Thomson, at pp. 649–650)—
    39
    The Court of Appeal cases demonstrate that forfeiture of compensation is
    often an appropriate response to conflicted representation. But they do not stand
    for the proposition that quantum meruit recovery for legal services performed
    while the attorney suffers from an unwaived conflict of interest is categorically
    barred, and we do not so hold. We instead hold that the issue is generally one for
    the discretion of the trial court, to be exercised in light of all the circumstances that
    gave rise to the conflict. Once again, the Restatement provides useful guidance:
    “Considerations relevant to the question of forfeiture include the gravity and
    timing of the violation, its willfulness, its effect on the value of the lawyer’s work
    for the client, any other threatened or actual harm to the client, and the adequacy
    of other remedies.” (Rest.3d Law Governing Lawyers, supra, § 37; see also
    Kidney Association of Oregon v. 
    Ferguson, supra
    , 843 P.2d at p. 477 [factors to be
    considered include the value of services to the client and “ “whether the breach
    was intentional, negligent or without fault’ ”].)
    When a law firm seeks fees in quantum meruit that it is unable to recover
    under the contract because it has breached an ethical duty to its client, the burden
    of proof on these or other factors lies with the firm. To be entitled to a measure of
    recovery, the firm must show that the violation was neither willful nor egregious,
    and it must show that its conduct was not so potentially damaging to the client as
    to warrant a complete denial of compensation. And before the trial court may
    award compensation, it must be satisfied that the award does not undermine
    as well as a different judgment about the range of remedies that will effectively
    avoid undermining incentives to comply with the relevant rules (see 
    id. at p.
    651).
    Under these circumstances, we conclude consideration of aggravating and
    mitigating circumstances, such as whether the law firm knowingly violated rule
    3-310(C)(3) and whether the conflict affected the value of its legal work, is more
    appropriate than the “undeniably harsh” categorical rule applied in Thomson.
    (Thomson, at p. 650.)
    40
    incentives for compliance with the Rules of Professional Conduct. For this reason,
    at least absent exceptional circumstances, the contractual fee will not serve as an
    appropriate measure of quantum meruit recovery. 
    (Huskinson, supra
    , 32 Cal.4th
    at p. 458, fn. 2, citing 
    Chambers, supra
    , 29 Cal.4th at p. 162.) Although the law
    firm may be entitled to some compensation for its work, its ethical breach will
    ordinarily require it to relinquish some or all of the profits for which it negotiated.
    On remand, Sheppard Mullin may be unable to meet its burden and the trial
    court may find its misconduct so egregious or so potentially harmful to J-M as to
    preclude any award. But without a more robust factual record or any trial court
    findings we are unable to say it would be an abuse of discretion to order Sheppard
    Mullin compensated in some degree for the many thousands of hours of legal
    work it performed on J-M’s behalf before South Tahoe successfully moved to
    have Sheppard Mullin disqualified. Sheppard Mullin’s concurrent representation
    of J-M and South Tahoe in separate matters involved a conflict of interest
    affecting the representation itself, not merely the attorney’s compensation as in
    
    Huskinson, supra
    , 32 Cal.4th at page 463. But the firm did seek and obtain J-M’s
    written consent to the conflict, albeit through a blanket waiver clause we hold here
    to be ineffective under the circumstances, and it could properly have represented
    both clients had the consent been properly informed. (Rule 3-310(C)(3).) The law
    firm may have been legitimately confused about whether South Tahoe was J-M’s
    current client when it took on J-M’s defense, or it may in good faith have believed
    the engagement agreement’s blanket waiver provided J-M with sufficient
    information about potential conflicts of interest, there being at the time no explicit
    rule or binding precedent regarding the scope of required disclosure. The conflict
    was, moreover, not one in which Sheppard Mullin represented another client
    against J-M (compare 
    Jeffry, supra
    , 67 Cal.App.3d at p. 11). And although J-M is
    under no obligation to present evidence that it was injured—the harm resulting
    41
    from a violation of the duty of loyalty often being intangible and difficult to
    quantify—at this point, questions as to whether Sheppard Mullin’s conflict may
    have affected the value of its work or led to a loss or default in the qui tam
    litigation have not yet been litigated.
    On the other hand, considering Sheppard Mullin’s actions and reasoning in
    light of the rule set forth in rule 3-310(C)(3), the trial court may conclude that the
    firm has not shown it was legitimately confused or that it acted in good faith. The
    law firm may also be unable to show its conduct caused or threatened no harm or
    only minimal harm to its client. Considering these and other factors, the trial court
    may determine that the policy of rule 3-310(C)(3) is best vindicated by a complete
    forfeiture of compensation. On the limited factual record before us, however, we
    cannot conclude that the existence of an improperly waived conflict of interest, by
    itself, presents an absolute bar to the award of reasonable compensation for
    services rendered.
    By leaving open the possibility of quantum meruit compensation for the
    10,000 hours that Sheppard Mullin worked on J-M’s behalf, we in no way
    condone the practice of failing to inform a client of a known, existing conflict of
    interest before asking the client to sign a blanket conflicts waiver. Trust and
    confidence are central to the attorney-client relationship, and maintaining them
    requires an ethical attorney to display all possible candor in his or her disclosure of
    circumstances that may affect the client’s interests. Sheppard Mullin’s failure to
    exhibit the necessary candor in this case has rendered its contract with J-M
    unenforceable and has thus disentitled it to the benefit of the unpaid contract fees
    awarded by the arbitrators in this case. Whether Sheppard Mullin is nevertheless
    entitled to a measure of compensation for its work is, along with the other
    unresolved noncontract issues raised by the pleadings, a matter for the trial court
    to consider in the first instance.
    42
    V.
    We affirm the judgment of the Court of Appeal insofar as it reversed the
    superior court’s judgment entered on the arbitration award. We reverse the
    judgment of the Court of Appeal insofar as it ordered disgorgement of all fees
    collected, and remand for further proceedings consistent with our opinion.
    KRUGER, J.
    WE CONCUR:
    CORRIGAN, J.
    LIU, J.
    CUÉLLAR, J.
    NARES, J.*
    *      Associate Justice of the Court of Appeal, Fourth Appellate District,
    Division One, assigned by the Chief Justice pursuant to article VI, section 6 of the
    California Constitution.
    43
    CONCURRING AND DISSENTING OPINION BY CHIN, J.
    In March 2010, J-M Manufacturing Company, Inc. (J-M), hired Sheppard,
    Mullin, Richter & Hampton, LLP (Sheppard Mullin), to provide legal
    representation in a federal qui tam action in which various public entities were
    suing J-M for over $1 billion in damages. On the day J-M and Sheppard Mullin
    signed the engagement agreement, Sheppard Mullin knew, but failed to disclose,
    that one of the public entities suing J-M in the qui tam action — South Tahoe
    Public Utility District (South Tahoe) — was an existing client of the law firm.
    Nor did Sheppard Mullin disclose this fact during the next year of the qui tam
    litigation, although it actively represented South Tahoe in unrelated matters during
    that time. It finally disclosed the conflict to J-M in April 2011, only after learning
    that South Tahoe, which discovered the conflict on its own, was planning to move
    for Sheppard Mullin’s disqualification in the qui tam action. I agree with the
    majority that the conflict rendered the engagement agreement, including its
    arbitration clause, unenforceable as against public policy. However, I disagree
    with the majority that, notwithstanding the conflict and the agreement’s invalidity,
    Sheppard Mullin may be entitled to recover from J-M in quantum meruit for the
    value of the legal services it provided in the qui tam action. I would instead hold
    that Sheppard Mullin’s failure to disclose its known conflict of interest precludes it
    from any recovery. I dissent insofar as the majority holds otherwise.
    1
    FACTUAL AND PROCEDURAL BACKGROUND
    In 2006, J-M, a pipe manufacturer, was sued in a federal court qui tam
    action regarding pipe it sold to 200 public entities, including South Tahoe. The
    complaint demanded over $1 billion in damages. On February 5, 2010, South
    Tahoe intervened in the action.
    On February 22, 2010, representatives of J-M — including its general
    counsel, Camilla Eng — met with Sheppard Mullin attorneys Bryan Daly and
    Charles Kreindler about taking over as J-M’s defense counsel in the qui tam
    action. On March 4, 2010, Sheppard Mullin and J-M signed an engagement
    agreement, which included the following general conflict waiver provision:
    “Sheppard . . . has many attorneys and multiple offices. We may currently or in
    the future represent one or more other clients (including current, former, and
    future clients) in matters involving [J-M]. We undertake this engagement on the
    condition that we may represent another client in a matter in which we do not
    represent [J-M], even if the interests of the other client are adverse to [J-M]
    (including appearance on behalf of another client adverse to [J-M] in litigation or
    arbitration) and can also, if necessary, examine or cross-examine [J-M] personnel
    on behalf of that other client in such proceedings or in other proceedings to which
    [J-M] is not a party provided the other matter is not substantially related to our
    representation of [J-M] and in the course of representing [J-M] we have not
    obtained confidential information of [J-M] material to representation of the other
    client. By consenting to this arrangement, [J-M] is waiving our obligation of
    loyalty to it so long as we maintain confidentiality and adhere to the foregoing
    limitations. We seek this consent to allow our Firm to meet the needs of existing
    and future clients, to remain available to those other clients and to render legal
    services with vigor and competence. Also, if an attorney does not continue an
    engagement or must withdraw therefrom, the client may incur delay, prejudice or
    additional cost such as acquainting new counsel with the matter.”
    2
    According to its general counsel, D. Ronald Ryland, before execution of the
    agreement, Sheppard Mullin ran “a conflicts check” and “identified South
    Tahoe . . . as a client in matters wholly unrelated to J-M.” Specifically, Sheppard
    Mullin attorney Jeffrey Dinkin had periodically represented South Tahoe on
    employment matters since at least 2002, and most recently in November 2009.
    Ryland concluded that “the matters Sheppard Mullin handled for South Tahoe
    were not ‘substantially related’ to the Qui Tam Action,” and that an “advance
    conflict waiver” South Tahoe had signed in 2006 — similar to the one J-M
    signed — therefore “authorized the undertaking of the representation.” In
    Ryland’s opinion, because South Tahoe had signed the advance waiver and J-M
    “was comfortable with, agreed to, and was prepared to sign” a similar waiver,
    “there was nothing to disclose to J-M” and he informed Daly and Kreindler that
    they could “agree to represent J-M in the Qui Tam Action.” Daly agreed that,
    because of South Tahoe’s advance conflict waiver, “there was no conflict” and
    that South Tahoe “presented [no] issue regarding representing J-M in the Qui Tam
    action.”
    Consistent with this view, before J-M executed the engagement agreement,
    Sheppard Mullin did not disclose its representation of South Tahoe. Indeed,
    according to the sworn declaration of Eng, who retained Sheppard Mullin on J-
    M’s behalf, “[d]uring the interview process leading to [Sheppard Mullin’s]
    retention, [Sheppard Mullin] attorneys assured [her] there were no conflicts with
    the firm’s proposed representation in the [qui tam] Action.” Sheppard Mullin has
    not denied this assertion. Daly stated in a sworn declaration that he did not
    “intentionally conceal[] an alleged conflict” from J-M. But, as noted above, he
    also declared that “there was no conflict” and that South Tahoe “presented [no]
    issue regarding representing J-M in the Qui Tam action.” Kreindler stated in a
    sworn declaration only that he “did not learn about any potential issue involving
    South Tahoe” at the time of the retention, adding that Daly “handled the tasks
    associated with J-M’s retention of Sheppard Mullin,” including “running and
    3
    evaluating the conflicts check.” Ryland stated in a sworn declaration that he “did
    not ‘conceal’ anything from J-M nor anyone else in connection with [Sheppard
    Mullin’s] retention by J-M.” But, as noted above, he also declared that “there was
    nothing to disclose to J-M.” Sheppard Mullin’s view that there was no conflict
    and nothing to disclose is completely consistent with Eng’s statement that
    Sheppard Mullin attorneys “assured” her “[d]uring the interview process” that
    “there were no conflicts with the firm’s proposed representation in the [qui tam]
    Action.”1
    A few weeks after the engagement agreement’s execution, Dinkin again
    began actively working for South Tahoe. During the next year, he billed it for
    about 12 hours of work. Sheppard Mullin did not disclose this fact either to J-M
    or to South Tahoe’s counsel in the qui tam action. In January 2011, South Tahoe’s
    qui tam counsel became aware that Sheppard Mullin was simultaneously
    representing J-M in the qui tam action and South Tahoe in other matters. In a
    letter dated March 4, 2011, asking Sheppard Mullin to explain the situation, South
    Tahoe’s counsel stated that it had learned that Sheppard Mullin “concurrently has
    represented” South Tahoe “for the entire time Sheppard Mullin has been adverse
    to South Tahoe in the [qui tam] action,” and that Sheppard Mullin’s “ongoing
    representation of South Tahoe predate[d] Sheppard Mullin’s representation of” J-
    M “by several years.” In response, Kreindler did not deny these assertions, and
    instead acknowledged that Sheppard Mullin “has been representing South Tahoe
    for many years in connection with general employment matters.” He also cited the
    “conflict waiver” in the “current engagement letter” with South Tahoe, and stated
    that, “in response to” South Tahoe’s March 4 letter, “an ethical wall,” though “not
    required,” had been “erected between” Sheppard Mullin employees “who may be
    1       Consistent with this analysis, although Sheppard Mullin’s reply brief offers
    circumstantial reasons for disbelieving Eng’s statement, it conspicuously fails to
    cite anything in the record — including the many declarations its attorneys filed in
    this case — to refute Eng’s statement.
    4
    involved with the representation of J-M, and those who may be involved with
    general employment matters with South Tahoe.” Unsatisfied with the response,
    on April 11, 2011, South Tahoe’s counsel informed Sheppard Mullin that South
    Tahoe was “contemplating” filing a motion to disqualify Sheppard Mullin from
    the qui tam case, and asked for a “meet and confer discussion” regarding the
    motion. During a subsequent telephone conference on April 19, South Tahoe’s
    counsel reiterated its intention to move for Sheppard Mullin’s disqualification as
    J-M’s counsel.2
    Between March 4, when South Tahoe’s counsel first wrote to Sheppard
    Mullin about the conflict, and the April 19 telephone conference, Sheppard Mullin
    did not inform J-M that South Tahoe was questioning Sheppard Mullin’s
    representation of J-M based on a conflict of interest, or that Sheppard Mullin was
    communicating with South Tahoe’s counsel on this issue. It finally did so on
    April 20, informing Eng by email that South Tahoe’s counsel “has threatened to
    file a motion to disqualify Sheppard Mullin because a lawyer in our Santa Barbara
    office gives employment advice to South Tahoe.” Even then, Sheppard Mullin did
    not disclose its March 2010 pre-engagement conflicts check. Eng did not discover
    that information for another two months, when Ryland filed with the court a
    declaration discussing the issue.
    On May 9, 2011, South Tahoe’s counsel moved to disqualify Sheppard
    Mullin as J-M’s counsel. Sheppard Mullin opposed the motion based on South
    2       According to South Tahoe’s attorney, Kreindler stated during the April 19
    telephone conference that Sheppard Mullin “had run a conflict check prior to
    accepting the engagement with J-M,” and it “showed South Tahoe to be an
    existing client.” Kreindler maintains he “did not refer to South Tahoe as an
    ‘existing’ client,” but explained that Sheppard Mullin “had done some labor work
    for South Tahoe that had concluded by November 2009” and “had done some very
    modest additional labor work for South Tahoe since [Sheppard Mullin] had
    become involved in the Qui Tam Action.”
    5
    Tahoe’s execution of the advance conflict waiver. In letters offering to settle the
    dispute — which proposed a $250,000 cash payment and 40 hours of free
    employment related legal work in exchange for South Tahoe’s conflict waiver —
    Sheppard Mullin referenced its “long-standing relationship” with South Tahoe,
    noting that it had “been pleased to provide labor advice to [South Tahoe] for the
    last 9 years.” The court ultimately granted the motion, finding that the advance
    waiver was insufficient and that Sheppard Mullin’s representation therefore
    violated rule 3-310(C)(3) of the Rules of Professional Conduct,3 which provides
    that an attorney “shall not, without the informed written consent of each client . . .
    [¶] . . . [¶] . . . [r]epresent a client in a matter and at the same time in a separate
    matter accept as a client a person or entity whose interest in the first matter is
    adverse to the client in the first matter.”
    Sheppard Mullin sued J-M for unpaid fees, asserting it was still owed $1
    million of the $3 million it had billed (for about 10,000 hours of work). J-M filed
    a cross-complaint asserting various claims and requesting disgorgement of fees
    paid and exemplary damages.
    Sheppard moved to compel arbitration under the engagement agreement’s
    arbitration provision. The court granted the motion, rejecting J-M’s claim that
    Sheppard Mullin’s ethical violation rendered the entire agreement, including the
    arbitration clause, illegal and unenforceable. The arbitrators subsequently found
    for Sheppard Mullin, reasoning that any ethical violation was not so serious or
    egregious as to warrant forfeiture and disgorgement of fees. They awarded
    Sheppard Mullin over $1.3 million in fees and interest. On Sheppard Mullin’s
    motion, the superior court confirmed the award, rejecting J-M’s renewed claim
    that the agreement was illegal and unenforceable due to the rules violation.
    3    All further unlabeled rule references are to the Rules of Professional
    Conduct.
    6
    The Court of Appeal reversed, holding: (1) the parties agreed that
    California law would govern any disputes; (2) under California law, a claim that a
    contract is wholly illegal and unenforceable is for a court to decide,
    notwithstanding an arbitration clause; (3) Sheppard Mullin violated rule 3-
    310(C)(3); and (4) the violation rendered the engagement agreement
    unenforceable and precluded Sheppard Mullin from recovering any fees, even in
    quantum meruit.
    DISCUSSION
    Initially, I agree with the majority in the following respects: (1) where
    California law governs, a court may invalidate an arbitration award on the ground
    that the contract containing the parties’ arbitration agreement violates the public
    policy of the state as expressed in the Rules of Professional Conduct; (2) when
    Sheppard Mullin and J-M signed the engagement agreement regarding the qui tam
    action, Sheppard Mullin had an existing attorney-client relationship with South
    Tahoe on unrelated matters; (3) Sheppard Mullin knew of this existing conflict but
    failed to disclose it to J-M; (4) because of the nondisclosure, the waiver J-M
    signed was insufficient to permit Sheppard Mullin to represent J-M
    notwithstanding the existing conflict; (5) the undisclosed conflict violated rule 3-
    310(C)(3) and renders the engagement agreement unenforceable in its entirety;
    and (6) because the engagement agreement is unenforceable in its entirety,
    Sheppard Mullin is not entitled to the benefit of the arbitrators’ decision awarding
    it unpaid contractual fees.
    However, I disagree with the majority’s holding that Sheppard Mullin may
    pursue recovery in quantum meruit for the value of the services it rendered to J-M.
    Unlike the majority, which “begin[s] by considering” the Restatement Third of the
    Law Governing Lawyers (maj. opn., ante, at p. 32), I begin with our own
    precedent — Huskinson & Brown v. Wolf (2004) 
    32 Cal. 4th 453
    , 462
    (Huskinson) — which the majority curiously discusses only as a brief afterthought
    at the end of its opinion (maj. opn., ante, at pp. 38-39). Huskinson involved a fee
    7
    dispute, not between a lawyer and client, but between two law firms that had
    entered into a fee-sharing agreement without complying with the ethical rule
    requiring them to obtain the client’s informed written consent to the agreement.
    (Huskinson, at p. 456.) We held that, although the ethical violation precluded the
    agreement’s enforcement, the plaintiff law firm was entitled to quantum meruit
    recovery from the defendant law firm for the reasonable value of the legal services
    it provided to the client. (Ibid.) In reaching this conclusion, “we look[ed] first” to
    whether a quantum meruit award would be contrary to what the violated rule
    “seeks to accomplish,” i.e., prohibiting attorneys from dividing “ ‘a fee for legal
    services’ ” absent the client’s informed consent. (Id. at p. 458.) We held that it
    would not, reasoning that the violated rule “does not purport to restrict attorney
    compensation on any basis other than a division of fees” (ibid.) and that an award
    “based on the reasonable value of” (
    id. at p.
    459) legal services neither
    “constitute[s] a division of fees within the rule’s contemplation” nor is “otherwise
    tied to the specific legal fees [the client] paid” (ibid.).
    We also considered in Huskinson whether permitting quantum meruit
    recovery as between law firms would be “consistent with case law holding or
    otherwise recognizing that attorneys may recover from their clients the reasonable
    value of their legal services when their fee contracts or compensation agreements
    are found to be invalid or unenforceable for other reasons.” 
    (Huskinson, supra
    , 32
    Cal.4th at p. 461.) We concluded that it would. (Ibid.) Notably, in reaching this
    conclusion, we distinguished two decisions — Jeffry v. Pounds (1977) 
    67 Cal. App. 3d 6
    (Jeffry), and Goldstein v. Lees (1975) 
    46 Cal. App. 3d 614
    (Goldstein) — in which courts disallowed any quantum meruit recovery for an
    ethical rule violation. “Those cases,” we explained, “involved violations of a rule
    that proscribed the very conduct for which compensation was sought, i.e., the rule
    prohibiting attorneys from engaging in conflicting representation or accepting
    professional employment adverse to the interests of a client or former client
    without the written consent of both parties.” (Huskinson, at p. 463.) By contrast,
    8
    we reasoned, the violated fee-sharing rule at issue in Huskinson did “not bar the
    services plaintiff rendered on [the client’s] behalf; it simply prohibit[ed] the
    dividing of [the client’s] fees because she was not provided written disclosure of
    the fee-sharing agreement and her written consent was not obtained.” (Ibid.)
    Another factor we considered in Huskinson was whether “[t]he
    Legislature’s regulation of fee agreements between attorneys and clients favor[ed]
    the availability of quantum meruit recovery.” 
    (Huskinson, supra
    , 32 Cal.4th at p.
    460.) We concluded that it did, explaining that the Legislature, in several statutes
    rendering attorney-client fee agreements voidable absent a signed agreement, had
    specified that if the client voided an agreement for noncompliance, the attorney
    was “ ‘entitled to collect a reasonable fee.’ ” (Ibid., quoting Bus. & Prof. Code,
    §§ 6147, subd. (b), 6148, subd. (c).) “Allowing quantum meruit recovery when
    two law firms negotiate a fee-sharing agreement without complying with [the
    ethics rule’s] written client consent requirement is consistent with the
    Legislature’s policy determination that, even if a particular fee or compensation
    agreement is not in writing or signed by the client, a law firm laboring under such
    an agreement nonetheless deserves reasonable compensation for its services.”
    (Huskinson, at p. 460.)
    Finally, we considered in Huskinson whether allowing recovery in quantum
    meruit would “undermine” or “discourage compliance with” the violated rule.
    
    (Huskinson, supra
    , 32 Cal.4th at pp. 459, 460.) We concluded it would not,
    explaining: “Attorneys who negotiate contingent fee-sharing agreements, which
    take into account the risk that the client pays no fee if the client does not prevail in
    his or her case, understandably prefer to receive their negotiated fees rather than
    the typically lesser amounts representing the reasonable value of the work
    performed. Consequently, even if quantum meruit recovery is available when the
    absence of client notification or consent renders a fee-sharing agreement
    unenforceable, such attorneys have no less incentive to comply with rule 2–200.”
    (Id. at p. 460.)
    9
    Applying the approach and the factors we set forth in Huskinson, I
    conclude that quantum meruit recovery is unavailable in this case. The answer to
    the “first” question we considered in Huskinson — whether a quantum meruit
    award would be contrary to what the violated rule “seeks to accomplish”
    
    (Huskinson, supra
    , 32 Cal.4th at p. 458) — is clearly yes. As here relevant, the
    purpose of rule 3-310 is to preclude attorneys from simultaneously representing
    clients with conflicting interests absent the clients’ informed written consent.
    Because Sheppard Mullin did not get that consent, a quantum meruit award would
    compensate it for legal services that the rule expressly precluded it from
    providing. Indeed, the majority agrees that the conflict resulting from Sheppard
    Mullin’s concurrent representation of J-M and South Tahoe “affect[ed] the
    representation itself, not merely the attorney’s compensation as in Huskinson.”
    (Maj. opn., ante, at p. 41, first italics added.)
    As to whether permitting quantum meruit recovery here would be
    “consistent with case law” 
    (Huskinson, supra
    , 32 Cal.4th at p. 461), based on the
    very case law we discussed in Huskinson — as well as other case law — I
    conclude that the answer is no. As discussed above, in reaching our conclusion in
    Huskinson, we distinguished Jeffry and Goldstein — which disallowed any
    quantum meruit recovery for an ethical rule violation — on the basis that those
    decisions “involved violations of a rule that proscribed the very conduct for which
    compensation was sought, i.e., the rule prohibiting attorneys from engaging in
    conflicting representation or accepting professional employment adverse to the
    interests of a client or former client without the written consent of both parties.”
    (Huskinson, at p. 463.) The case now before us fits precisely within that
    description: It involves violation of a rule “that proscribed the very conduct for
    which compensation was sought, i.e., the rule prohibiting attorneys from engaging
    in conflicting representation or accepting professional employment adverse to the
    interests of a client or former client without the written consent of both parties.”
    (Ibid.) Again, as the majority explains, the conflict resulting from Sheppard
    10
    Mullin’s concurrent representation of J-M and South Tahoe “affect[ed] the
    representation itself, not merely the attorney’s compensation as in Huskinson.”
    (Maj. opn., ante, at p. 41, first italics added.)
    The majority declares Jeffry and Goldstein to be unpersuasive. (Maj. opn.,
    ante, at pp. 34-36.) Jeffry’s holding, the majority states, “was not surprising” in
    light of the facts — “the law firm had decided to represent the client’s wife in a
    lawsuit against him, without making any effort to obtain his consent” — “[b]ut the
    court did not purport to craft a rule to govern all other breaches, nor did it offer
    any reasoning to support such a categorical rule.” (Maj. opn., ante, at p. 35) Nor,
    the majority asserts, did Goldstein offer any “supportive reasoning” for its
    conclusion that noncontractual recovery was unavailable. (Maj. opn., ante, at p.
    36.)
    For several reasons, I disagree with the majority’s analysis. First, the
    majority’s description of the facts in Jeffry is somewhat misleading. The “law
    firm” there did not decide to represent the wife of its existing client in their marital
    dissolution action. (Maj. opn., ante, at p. 34.) One attorney in the firm undertook
    to represent the client’s wife in the dissolution action “without the knowledge of”
    a different attorney who was representing the existing client in a personal injury
    action “and without knowledge of the status of the personal injury litigation.”
    (
    Jeffry, supra
    , 67 Cal.App.3d at p. 8.) Indeed, the court remarked that it was “not
    charg[ing] [the attorneys] with dishonest purpose or deliberately unethical
    conduct.” (Id. at p. 11.) Here, of course, when Sheppard Mullin undertook to
    represent J-M, it did know — because it ran a conflicts check — of the existing
    conflict, but made a decision not to disclose it. Second, I disagree that neither
    Jeffry nor Goldstein offers reasoning to support denying recovery in this case.
    Both decisions relied on our statement in Clark v. Millsap (1926) 
    197 Cal. 765
    (Clark), that “ ‘acts of impropriety inconsistent with the character of the [legal]
    profession, and incompatible with the faithful discharge of its duties’ ” “will
    prevent [an attorney] from recovering for services rendered.” (Id. at p. 785; see
    11
    Jeffry, at p. 9; 
    Goldstein, supra
    , 46 Cal.App.3d at p. 618.) In my view, knowingly
    representing clients with conflicting interests, without disclosing the conflict to
    either client and obtaining the clients’ written consent to the simultaneous
    representation, is an “ ‘act[] of impropriety inconsistent with the character of the
    [legal] profession, and incompatible with the faithful discharge of its duties.’ ”
    (Clark, at p. 785.) Indeed, this is precisely how the appellate courts in Jeffry and
    Goldstein applied Clark’s statement.4
    The key to understanding this application of Clark is the fact that Sheppard
    Mullin’s simultaneous and undisclosed representation of South Tahoe and J-M
    violated “the most fundamental of all duties” that a lawyer owes a client: the
    “duty of loyalty.” (State Compensation Insurance Fund v. Drobot (C.D.Cal.
    2016) 
    192 F. Supp. 3d 1080
    , 1084 (Drobot).) As we have explained, “[t]he primary
    value at stake in cases of simultaneous or dual representation” — even with
    respect to unrelated matters — “is the attorney’s duty — and the client’s
    legitimate expectation — of loyalty.” (Flatt v. Superior Court (1994) 
    9 Cal. 4th 275
    , 284 (Flatt).) This “inviolate” duty (
    id. at p.
    288) is a “fundamental value of
    our legal system” (People ex rel. Dept. of Corporations v. SpeeDee Oil Change
    Systems, Inc. (1999) 
    20 Cal. 4th 1135
    , 1146 (SpeeDee)). “The effective
    4       The majority’s statement that in Clark “we upheld a trial court’s award of
    only a partial fee” (maj. opn., ante, at p. 36, fn. 12) is both inaccurate and
    misleading. It is inaccurate because the fee the trial court awarded in Clark —
    $7,500 — was not a “partial” fee (maj. opn., ante, at p. 36, fn. 12); it was the total
    fee that, according to the plaintiff, the parties had agreed upon 
    (Clark, supra
    , 197
    Cal. at p. 775). In agreeing with the plaintiff and awarding this amount “in full for
    all services performed” (
    id. at p.
    785), the trial court rejected the attorney’s
    contention that a $20,000 promissory note the plaintiff had signed represented “the
    fee that [the attorney] was to receive for professional services,” and the court
    additionally “refused to allow [the attorney] any credit on account of said note on
    the ground that its execution was fraudulently procured and was without
    consideration” (
    id. at p.
    775). The majority’s statement is misleading because we
    upheld the $7,500 award notwithstanding the attorney’s fraudulent acts because
    the plaintiff in Clark “did not object to the allowance of” that sum. (Id. at p. 785.)
    Here, of course, J-M does object to the award of any compensation.
    12
    functioning of the fiduciary relationship between attorney and client depends on
    the client’s trust and confidence in counsel.” (SpeeDee, at p. 1146.) “A client
    who learns that his or her lawyer is also representing a litigation adversary, even
    with respect to a matter wholly unrelated to the one for which counsel was
    retained, cannot long be expected to sustain the level of confidence and trust in
    counsel that is one of the foundations of the professional relationship. All legal
    technicalities aside, few if any clients would be willing to suffer the prospect of
    their attorney continuing to represent them under such circumstances.” (Flatt, at
    p. 285.) But an attorney’s “duty to maintain undivided loyalty” is vital, not just in
    protecting the client’s trust and confidence in his or her attorney, but more broadly
    in maintaining “public confidence in the legal profession and the judicial process.”
    (SpeeDee, at p. 1146; see Santa Clara County Counsel Attys. Assn. v. Woodside
    (1994) 
    7 Cal. 4th 525
    , 547, fn. 6 [“rationale for” the rule prohibiting attorneys,
    without consent, from accepting employment adverse to a client even in unrelated
    matters is “the maintenance of the attorney’s ‘duty of undivided loyalty,’ without
    which ‘ “public confidence in the legal profession and the judicial process” is
    undermined’ ”].) For these reasons, “in all but a few instances, the rule of
    disqualification in simultaneous representation cases is a per se or ‘automatic’
    one” (Flatt, at p. 284), “regardless of whether the simultaneous representations
    have anything in common or present any risk that confidences obtained in one
    matter would be used in the other” (SpeeDee, at p. 1147.) This rule, which is
    “analogous to the biblical injunction against ‘serving two masters’ ” (Flatt, at p.
    286), “protect[s] clients’ legitimate expectations of loyalty [in order] to preserve
    this essential basis for trust and security in the attorney-client relationship”
    (SpeeDee, at p. 1147).
    Of course, because “[t]he principle of loyalty is for the client’s benefit,” an
    attorney may simultaneously represent clients “whose interests are adverse as to
    unrelated matters provided full disclosure is made and both agree in writing to
    waive the conflict.” 
    (Flatt, supra
    , 9 Cal.4th at p. 285, fn. 4, second italics added.)
    13
    However, given the vital and fundamental role of the duty of loyalty in our legal
    system — including maintaining “public confidence in the legal profession and the
    judicial process” 
    (SpeeDee, supra
    , 20 Cal.4th at p. 1146) — where, as here, full
    disclosure is not made and informed consent is not obtained, knowingly
    representing clients with conflicting interests constitutes an “ ‘act[] of impropriety
    inconsistent with the character of the [legal] profession, and incompatible with the
    faithful discharge of its duties,’ ” so as to “ ‘prevent [the attorney] from
    recovering for services rendered.’ ” 
    (Clark, supra
    , 197 Cal. at p. 785.) The
    majority fails to explain how it concludes otherwise.
    Finally, the majority’s treatment of Jeffry and Goldstein is difficult to
    square with our treatment of those decisions in Huskinson. There, we could have
    limited and criticized Jeffry and Goldstein as the majority attempts to do so here.
    Instead, we attributed their denial of quantum meruit recovery to a common factor
    that was absent in decisions that allowed quantum meruit recovery: “violations of
    a rule that proscribed the very conduct for which compensation was sought, i.e.,
    the rule prohibiting attorneys from engaging in conflicting representation or
    accepting professional employment adverse to the interests of a client or former
    client without the written consent of both parties.” 
    (Huskinson, supra
    , 32 Cal.4th
    at p. 463.) It is of course true, as the majority asserts, that “we did not decide” in
    Huskinson that an unwaived conflict of interest, standing alone, always requires
    the denial of compensation. (Maj. opn., ante, at p. 39.) Had we done so, the
    present case would surely not be before us. However, our discussion in Huskinson
    of Jeffry and Goldstein was important to our analysis, and the majority errs by
    cavalierly casting it aside simply because the issue now before us “was not
    presented” in that case. (Maj. opn., ante, at p. 39.) The majority’s summary
    treatment of our discussion ignores the fact that our description in Huskinson of
    the common factor that explained the denial of all recovery in Jeffry and
    Goldstein — “violations of a rule that proscribed the very conduct for which
    compensation was sought, i.e., the rule prohibiting attorneys from engaging in
    14
    conflicting representation or accepting professional employment adverse to the
    interests of a client or former client without the written consent of both parties”
    (Huskinson, at p. 463) — is completely in line with the starting point of our
    analysis in Huskinson: whether a quantum meruit award would be contrary to
    what the violated rule “seeks to accomplish.” (Id. at p. 458.)
    Notably, our appellate courts have read Huskinson precisely as I do. In
    Fair v. Bakhtiari (2011) 
    195 Cal. App. 4th 1135
    , 1141, an attorney violated the
    Rules of Professional Conduct by entering into business relationships with clients
    without complying with written disclosure and consent requirements. The trial
    court concluded that the violation precluded the attorney from recovering the
    reasonable value of the services he had provided, even though the transaction had
    been “very successful.” (Ibid.) In affirming, the Court of Appeal relied heavily
    on Huskinson, explaining: “[W]e read Huskinson . . . as recognizing a distinction
    between the type of violations that may render an agreement voidable, but still
    allow the attorney compensation for the reasonable value of his or her services,
    and the type of violation that precludes such recovery: Attorneys who violate a
    rule of professional conduct may recover in quantum meruit where they do not act
    in violation of an express statutory prohibition when providing legal services and
    where the subject services are not otherwise prohibited. [Citation.] On the other
    hand, violation of a rule that constitutes a serious breach of fiduciary duty, such as
    a conflict of interest that goes to the heart of the attorney-client relationship,
    warrants denial of quantum meruit recovery.” (Fair, at p. 1161, second italics
    added.)
    Still other California case law supports the conclusion that Sheppard
    Mullin’s ethical violation precludes it from seeking quantum meruit recovery. In
    A.I. Credit Corp., Inc. v. Aguilar & Sebastinelli (2003) 
    113 Cal. App. 4th 1072
    ,
    1075, a law firm pursuing a collection matter against a former client was
    disqualified under rule 3-310(E) because it failed to obtain the former client’s
    informed written consent to the conflicting representation. The law firm’s client
    15
    in the collection matter sued for a declaration that, because of the disqualification,
    it owed the law firm nothing for its legal services. (A.I. Credit Corp., at p. 1076.)
    The law firm filed an answer raising the defense of quantum meruit. (Ibid.) The
    trial court granted summary judgment to the client, ruling that the law firm was
    not entitled to compensation. (Ibid.) The Court of Appeal affirmed, citing “[t]he
    general rule . . . that an attorney disqualified for violating an ethical obligation is
    not entitled to fees.” (Id. at p. 1079.) The court rejected the law firm’s argument
    that recovery should be allowed because it had committed only “a minor technical
    [rules] violation . . . due to its failure to obtain a waiver,” explaining: “The trial
    court determined that there was a disqualifying violation of ethical obligations.
    Consequently, . . . there is no genuine issue of material fact in this regard
    precluding summary judgment.” (Ibid.)
    By contrast, none of the case law the majority cites truly supports its
    conclusion that Sheppard Mullin may be entitled to quantum meruit recovery in
    this case. The majority principally relies on Pringle v. La Chapelle (1999) 
    73 Cal. App. 4th 1000
    (Pringle) (maj. opn., ante, at p. 37), but that case did not even
    involve quantum meruit recovery or a proven violation of the ethical rules; it
    involved recovery on the contract itself based on a jury finding of no ethical
    violation. In Pringle, an attorney who had simultaneously represented a
    corporation, its president, and its CEO as codefendants in a harassment action filed
    a complaint seeking money owed “pursuant to written fee agreements.” (Pringle,
    at p. 1002.) One of the agreements contained a lengthy discussion of the potential
    conflicts of interest arising from an attorney’s simultaneous representation of
    multiple parties and advised the defendants to consult with independent counsel
    before signing a waiver. (Ibid.) The CEO executed the waiver and agreement on
    his own behalf and on behalf of the corporation. (Id. at p. 1003.) On this record,
    the jury “returned a general verdict” for the attorney, finding in a special verdict
    that the CEO “had given informed written consent to allow [the attorney] to
    represent more than one client.” (Ibid.) In seeking to overturn the verdict on
    16
    appeal, the CEO asserted that the attorney had violated the ethical rule requiring a
    corporation’s conflict waiver to be signed by someone who is not also being
    individually represented by the same attorney. (Id. at p. 1005.) The appellate
    court affirmed the jury’s verdict, stating: “We have no evidence [in the record
    before us] which would enable us to ascertain if there was conflicting evidence on
    whether [the attorney] violated the Rules of Professional Conduct. We do not
    know if the corporation, in some way other than the two fee agreements,
    consented to the representation.” (Ibid.) In short, there was no proven rule
    violation in Pringle, and no attempt to recover in quantum meruit.
    In dictum, the court in Pringle went on to discuss the CEO’s argument that
    “an attorney’s breach of a rule of professional conduct may negate an attorney’s
    claim for fees.” 
    (Pringle, supra
    , 73 Cal.App.4th at p. 1005.) The court observed
    that the CEO had “not cited a case standing for the proposition that a violation of a
    rule of professional conduct automatically precludes an attorney from obtaining
    fees.” (Id. at pp. 1005-1006.) Of course, the issue here is not whether any
    violation of any of the Rules of Professional Conduct automatically precludes
    recovery. Certainly, Huskinson refutes that proposition. The issue here is whether
    such recovery is barred by the violation of one particular rule — the rule that
    absolutely precludes attorneys from simultaneously representing clients with
    conflicting interests absent full disclosure of the conflict and consent, in order to
    preserve “the most fundamental of all duties a lawyer owes a client”: the duty of
    loyalty. 
    (Drobot, supra
    , 192 F.Supp.3d at p. 1084.) The Pringle court also noted
    that the simultaneous representation presented a “potential” conflict of interest,
    that it did “not know if the interests of [the CEO] and [the corporation actually]
    diverged,” and that it therefore could not “ascertain if the purported rule violation
    by [the attorney] was incompatible with the faithful discharge of her duties.”
    (Pringle, at pp. 1006, 1007.) Here, of course, there was an actual conflict of
    interest, because one of Sheppard Mullin’s existing clients was suing another of its
    existing clients. Thus, as explained above, we can “ascertain” that Sheppard
    17
    Mullin’s proven rule violation “was incompatible with the faithful discharge of
    [its] duties.” (Id. at p. 1007.) For these reasons, Pringle does not support the
    majority’s view that Sheppard Mullin may pursue quantum meruit recovery
    notwithstanding its violation of rule 3-310.
    For many similar reasons — and some additional ones — nor does
    Mardirossian & Associates, Inc. v. Ersoff (2007) 
    153 Cal. App. 4th 257
    (Mardirossian), which the majority also cites. (Maj. opn., ante, at p. 38.) In
    Mardirossian, a law firm that had filed an action on behalf of two clients — Ersoff
    and Leonard — was fired by Ersoff shortly before he settled his claim.
    (Mardirossian, at pp. 261-263.) Thus, like Pringle, it involved counsel that was
    simultaneously representing several clients on the same side in a single a case.
    Also like Pringle, Mardirossian involved, not an actual conflict of interest, but “at
    most, a potential conflict of interest between” the simultaneously represented
    clients. (Mardirossian, at p. 264.) As in Pringle, in Mardirossian, the trier of fact
    found that the written waiver each client had signed — which expressly stated that
    a conflict might exist with the other identified client and acknowledged the
    opportunity to consult with separate counsel concerning the issue — “was
    sufficient and valid.” (Mardirossian, at p. 264.) In affirming the trial court’s
    decision, the Court of Appeal did not disagree with this finding, but took an
    alternative course. Citing Pringle, the court first stated that whether “the breach of
    a rule of professional conduct . . . warrant[s] a forfeiture of fees . . . depends on the
    egregiousness of the violation.” (Mardirossian, at p. 278.) It then held that, even
    if, as Ersoff contended, the waiver was insufficient because it “did not detail the
    conflicts at issue,” “Ersoff ha[d] not shown the violation was particularly
    egregious or that he was in any way prejudiced by it. Under the circumstances, we
    cannot say the trial court abused its discretion in concluding it would be
    inequitable and an ‘an unjust enrichment’ if Ersoff’s attorney fee obligation were
    to be excused ” (Id. at p. 279.) The circumstances to which the court was
    referring were the following: After the law firm filed a complaint, worked on the
    18
    case for seven months, and prepared for depositions and a mediation, Ersoff fired
    the firm and hired a new one in which his wife was a partner. (Id. at p. 263.) Nine
    days later, Ersoff settled the case, with the defendants agreeing to pay him $3.7
    million. (Ibid.) Leonard had “participat[ed] in the action to assist Ersoff.” (Id. at
    p. 262.) Because Mardirossian involved (1) an assumed violation of a different
    rule, (2) “at most,” only “a potential conflict of interest between” simultaneously
    represented clients on the same side of a single lawsuit (
    id. at p.
    264), and (3) an
    attorney who was fired by the client and replaced by the client’s wife’s law firm
    about a week before a very lucrative settlement was reached (ibid.), it does not
    support the majority’s conclusion that Sheppard Mullin may pursue quantum
    meruit recovery notwithstanding its knowing representation of actually conflicting
    interests without full disclosure and consent, which resulted in its disqualification
    by South Tahoe, not its firing by its client, J-M.
    The last decision the majority cites — Sullivan v. Dorsa (2005) 
    128 Cal. App. 4th 947
    (Sullivan) — is even more far afield. That case did not involve a
    request for quantum meruit recovery; it involved the request of a referee in a
    property partition proceeding for an award of fees to the law firm he had hired to
    provide him with legal services in connection with that proceeding. (Sullivan, at
    pp. 950-953.) Nor did it even involve a payment dispute between an attorney and
    client. The client — the referee — was in favor of the award; it was the owners of
    the property, who were not “clients” of the law firm, who opposed the award. (Id.
    at p. 964.) They objected to the fee request to the extent it included services the
    law firm provided after negotiations began with a prospective purchaser with
    whom the law firm had an existing legal relationship. (Id. at pp. 963-964.) In
    rejecting this claim, the court focused first on the owners’ lack of “standing” — as
    nonclients — “to protest the alleged representation of adverse interests.” (Id. at p.
    964.)
    The Sullivan court, after discussing and quoting Pringle at length, then
    added that the owners had “fail[ed] to show that any violation of the rules
    19
    governing representation of adverse interests was serious enough to compel a
    forfeiture of fees.” 
    (Sullivan, supra
    , 128 Cal.App.4th at p. 965.) In this regard,
    the court failed to appreciate that Pringle’s discussion was dicta and that Pringle
    involved only a potential conflict of interest between multiple clients on the same
    side in a single case. The court also offered no detailed discussion of the facts,
    noting instead that the owners had failed to “cit[e] pertinent portions of the record”
    (Sullivan, at p. 964) to establish the “misconduct” they had “alleged” the law firm
    committed (
    id. at p.
    965). Thus, the court did not discuss whether a law firm’s
    simultaneous and knowing representation of clients whose interests are actually
    “adverse” (rule 3-310(C)(3)), without disclosing the conflict, necessarily is
    “inconsistent with the character of the [legal] profession,” “incompatible with the
    faithful discharge of the attorney’s duties,” and a “ ‘serious violation of the
    attorney’s responsibilities.’ ” (Sullivan, at p. 965.) “[R]epresentations marred by
    actual conflicts of interest exude the egregious and readily apparent divided
    loyalty of counsel.” (Commonwealth v. Cousin (Mass. 2018) 
    88 N.E.3d 822
    , 831.)
    For these reasons, Sullivan does not support the majority’s conclusion that
    Sheppard Mullin may, at “the discretion of the trial court,” be entitled to quantum
    meruit recovery.5 (Maj. opn., ante, at p. 40.)
    5       The majority’s reliance on Pringle, Mardirossian, and Sullivan is
    problematic for an additional and important reason: all three are contrary to the
    majority’s analysis insofar as they place the burden on the client to defeat recovery
    by showing that the ethical violation was serious and caused harm. 
    (Pringle, supra
    , 73 Cal.App.4th at pp. 1006, 1007 [“On the record [the client] presented, we
    cannot ascertain if the purported violation of the rules was serious, if any act was
    inconsistent with the character of the profession,” or if the attorney “had obtained
    or would expect to obtain confidential information which might have been harmful
    to one client, but helpful to another”]; 
    Mardirossian, supra
    , 153 Cal.App.4th at p.
    279 [client “has not shown the violation was particularly egregious or that he was
    in any way prejudiced by it”]; 
    Sullivan, supra
    , 128 Cal.App.4th at p. 965 [clients
    “fail to show that any violation of the rules governing representation of adverse
    interests was serious enough to compel a forfeiture”].) The majority places the
    20
    Returning to Huskinson, another factor we cited there in holding that
    quantum meruit recovery was permissible is lacking in this case: a “policy
    determination” of the Legislature, expressed through statutes, “favor[ing] the
    availability of quantum meruit recovery” under the circumstances. 
    (Huskinson, supra
    , 32 Cal.4th at p. 460.) As explained above, in holding in Huskinson that
    quantum meruit recovery is available when law firms violate ethical disclosure
    and consent requirements regarding fee-sharing agreements, we relied in part on
    the fact that two statutes regulating fee agreements “specif[y]” that, where a client
    voids an agreement for noncompliance, “the attorney remains ‘entitled to collect a
    reasonable fee.’ ” (Huskinson, at p. 460.) I am aware of no statute — and neither
    Sheppard Mullin nor the majority cites one — reflecting a legislative policy
    determination that attorneys are entitled to a reasonable fee — or any other
    compensation — when they violate their duty of loyalty by undertaking to
    represent a client without disclosing a known and existing conflict with another
    client and obtaining both clients’ informed consent to the simultaneous
    representation.
    Finally, the last factor we discussed in Huskinson — “whether allowing
    recovery in quantum meruit would undermine compliance with” the violated
    ethics rule 
    (Huskinson, supra
    , 32 Cal.4th at p. 459) — supports denying quantum
    meruit in this case. In Huskinson, we emphasized that the ethics rule violated
    there did not bar the law firm that was seeking recovery from working on the case
    or rendering services “on [the client’s] behalf; it simply prohibit[ed] the dividing
    of [the client’s] fees because she was not provided written disclosure of the fee-
    sharing agreement and her written consent was not obtained.” (Id. at p. 463.) By
    contrast, in this case, the violated rule did preclude Sheppard Mullin from
    rendering services to J-M absent its informed consent. Thus, the risk Sheppard
    burden on Sheppard Mullin to prove that its ethical violation “was neither willful
    nor egregious” and “was not so potentially damaging to the client as to warrant a
    complete denial of compensation.” (Maj. opn., ante, at p. 40.)
    21
    Mullin faced if it disclosed to J-M that it was representing one of the entities suing
    J-M in the qui tam action was that J-M would decline to hire Sheppard Mullin and
    Sheppard Mullin would lose the representation in its entirety. Indeed, one must
    wonder why, other than that risk, Sheppard Mullin made a conscious decision after
    its conflicts check “identified” South Tahoe “as a client,” not to disclose the
    representation to J-M and to instead deal with this situation through a generalized
    conflicts waiver that only referenced the possibility Sheppard Mullin “may
    currently . . . represent one or more other clients . . . in matters involving” J-M.
    (Italics added.)
    Moreover, in “assum[ing]” in Huskinson that the law firm seeking recovery
    would “remain fully motivated to” comply with the ethical rule on fee-sharing
    agreements even if it obtained a quantum meruit award, we focused on the fact
    that a “contingent fee-sharing agreement[]” was at issue, such that “the negotiated
    fee” the law firm would lose if the fee-sharing agreement were not enforced “far
    exceed[ed] the amount of quantum meruit recovery,” i.e., “the reasonable value of
    the work performed.” 
    (Huskinson, supra
    , 32 Cal.4th at p. 460.) No such all-or-
    nothing contingent fee agreement is at issue here, and it is likely that the disparity
    between the contractual fees and “the value of the services [Sheppard Mullin]
    rendered to” J-M (maj. opn., ante, at p. 2) is considerably less than the disparity
    that was at issue in Huskinson. “Because the [contractual] fee [likely does not] far
    exceed[] the amount of quantum meruit recovery, we may logically assume that”
    law firms facing the loss of a lucrative representation because of a known and
    existing conflict will not “remain fully motivated to comply with” rule 3-310(C)
    (Huskinson, at p. 460) if, as the majority holds, they may recover in quantum
    meruit “the value of the services [they] rendered” notwithstanding their decision
    not to disclose the conflict (maj. opn., ante, at p. 2).
    In this regard, our decision in Thomson v. Call (1985) 
    38 Cal. 3d 633
    (Thomson) is instructive. There, the defendant — a member of the Albany City
    Council — sold land to the city for $258,000, thus violating a conflict of interest
    22
    statute that prohibited government employees from “ ‘be[ing] financially
    interested in any contract made by them in their official capacity, or by any body
    or board of which they are members.’ ” (Id. at p. 637, 638, fn. 2.) We held that
    the contract was void and unenforceable, that the city could keep the property, and
    that the defendant could not recover either on the contract or in quantum meruit,
    even though he had not committed fraud and had, in fact, relied on advice from the
    city attorney. (Id. at p. 646-652.) We considered, and rejected, several remedies
    “less severe than” complete forfeiture. (Id. at p. 651.) Allowing the defendant to
    recover “the fair market value of the land,” we explained, would present a “serious
    problem,” in that it would “provide[] only a weak incentive for public officials to
    avoid [conflicts of interest]. If they enter into such arrangements and ‘get caught’
    in the . . . violation, this remedy would leave them as well off as they were prior to
    the transaction; if the violation goes unnoticed or unchallenged, they would profit
    from the deal.” (Ibid.) Allowing such recovery would also be contrary to the
    conflict of interest statute’s “prophylactic function,” which was not to prevent
    “undue profit,” but “to prevent conflicts of interest from occurring.” (Id. at p.
    652.) Allowing recovery of the amount the defendant originally paid for the land,
    although “provid[ing] some incentive for officials to avoid conflict-of-interest
    situations,” would “also impl[y] that undue profit and loss to the city,” rather than
    the prevention of conflicts, “are the primary concerns” of the statute. (Ibid.) On
    the other hand, we explained, complete forfeiture “provides a strong disincentive
    for those officers who might be tempted to take personal advantage of their public
    offices” (
    id. at p.
    650), and “provides public officials with a strong incentive to
    avoid conflict-of-interest situations scrupulously” (ibid.). It also would
    “effectively implement[] the conflict-of-interest statutes’ strict public policy
    goals.” (Id. at p. 651.)
    Similar considerations warrant complete forfeiture in this case. Allowing
    attorneys who fail to disclose known conflicts of interest to “recover[] the value of
    the services [they] rendered to” their clients (maj. opn., ante, at p. 2) would
    23
    “provide[] only a weak incentive for” attorneys to comply with rule 3-310(C)
    
    (Thomson, supra
    , 38 Cal.3d at p. 651). If they undertake a representation without
    disclosing a conflict, “and ‘get caught’ in the . . . violation, this remedy would
    leave them [better] off [than] they were prior to the transaction; [and] if the
    violation goes unnoticed or unchallenged, they [may] profit” even more. (Ibid.)
    Allowing such recovery would also be contrary to rule 3-310(C)’s
    prophylactic function, which is to “protect[] the integrity of the attorney-client
    relationship,” not to address “specific acts of disloyalty or diminution of the
    quality of the attorney’s representation.” (Forrest v. Baeza (1997) 
    58 Cal. App. 4th 65
    , 74.) As discussed above, because of the duty of loyalty’s vital and
    fundamental role in our legal system, “in all but a few instances, the rule of
    disqualification in simultaneous representation cases is a per se or ‘automatic’
    one” 
    (Flatt, supra
    , 9 Cal.4th at p. 284), “regardless of whether the simultaneous
    representations have anything in common or present any risk that confidences
    obtained in one matter would be used in the other” 
    (SpeeDee, supra
    , 20 Cal.4th at
    p. 1147). This rule “is designed not alone to prevent the dishonest practitioner
    from fraudulent conduct, but as well to preclude . . . honest practitioner[s] from
    putting [themselves] in a position where [they] may be required to choose between
    conflicting duties, or be led to an attempt to reconcile conflicting interests, rather
    than to enforce to their full extent the rights of the interest which [they] should
    alone represent.” (Anderson v. Eaton (1930) 
    211 Cal. 113
    , 116 (Anderson).)
    Indeed, we have observed that these types of conflicts may “unconsciously” affect
    the decisionmaking even of attorneys “in good faith intending to discharge” their
    duty of loyalty to their clients. (Id. at p. 117.) “Conscience and good morals
    dictate that . . . attorney[s] should not so conduct [themselves] as to be open to the
    temptation of violating [their] obligation of fidelity and confidence.” (Ibid.)
    Because “[t]he principle of loyalty is for the client’s benefit,” an attorney may
    simultaneously represent clients “whose interests are adverse as to unrelated
    matters provided full disclosure is made and both agree in writing to waive the
    24
    conflict.” (Flatt, at p. 285, fn. 4.) However, where, as here, full disclosure is not
    made and informed consent is not obtained, allowing quantum meruit recovery
    would be contrary to rule 3-310(C)’s prophylactic function, which is to prevent
    attorneys even “from putting [themselves] in a position” (Anderson, at p. 116) that
    may “tempt[]” them to violate their “obligation of fidelity” (
    id. at p.
    117).
    The majority finds Thomson unhelpful and uninstructive, but the majority’s
    reasons are unconvincing. The majority first emphasizes that the trial court in
    Thomson, in denying all compensation, “held a trial and tailored a remedy
    appropriate to the facts and equities.” (Maj. opn., ante, at p. 39, fn. 16.) However,
    as the majority later recognizes, there was “ ‘a long, clearly established line of
    cases’ denying all recovery for” the kind of violation at issue in Thomson. (Maj.
    opn., ante, at p. 39, fn. 16.) As I have shown, there is also a line of cases denying
    all recovery for the kind of violation that Sheppard Mullin committed. Moreover,
    the majority overlooks the fact that in Thomson, notwithstanding the trial court’s
    conclusion, we independently “considered the possibility of” imposing “less
    severe” penalties 
    (Thomson, supra
    , 38 Cal.3d at p. 651), and we found those
    alternative penalties wanting because they lacked adequate deterrent impact and
    would poorly serve the prophylactic function of the conflict of interest statute
    there at issue (
    id. at pp.
    651-652). The majority offers no explanation or
    justification for its “different judgment about the range of remedies that will
    effectively avoid undermining incentives to comply with” the rule at issue here.
    (Maj. opn., ante, at p. 40, fn. 16.)
    In fact, the majority offers no real discussion of deterrence at all. Instead,
    without analysis, it simply directs trial courts to make case-by-case determinations
    of whether a quantum meruit award would, under the circumstances, “undermine
    incentives for compliance with the Rules of Professional Conduct.” (Maj. opn.,
    ante, at pp. 40-41.) The majority cites no authority for this novel approach.
    Certainly, nothing in Huskinson or in Thomson, where we addressed the issue
    ourselves, suggests that trial courts should make such a case-by-case inquiry. Nor
    25
    does the majority explain how trial courts are to make such case-by-case
    determinations. What factors should they consider? Is this part of the “the burden
    of proof” that the majority places on attorneys seeking quantum meruit recovery?
    (Maj. opn., ante, at p. 40.) If so, what constitutes evidence regarding the adequacy
    of the motivation to comply? Must the evidence address the effect of quantum
    meruit recovery on the motivation to comply, not just of the attorney seeking
    compensation in the case, but, as we discussed in Huskinson, of “all other
    similarly situated law firms and attorneys”? 
    (Huskinson, supra
    , 32 Cal.4th at p.
    460.) Again, how is a court supposed to determine this larger issue? Because the
    majority offers no standards to guide the inquiry, is a trial court’s determination
    reviewable, or is it effectively standardless and unreviewable? If it is reviewable,
    then what standard of review applies? The majority offers no guidance on any of
    these questions.
    Another consideration supporting my conclusion is one that J-M vigorously
    puts forth but that the majority barely acknowledges: the difficulty in determining
    whether the undisclosed conflict caused injury. J-M asserts that “it is
    extraordinarily difficult” — indeed “practically impossible” — “to prove that an
    attorney pulled punches due to divided loyalty,” and that “a conflict can cause an
    attorney to compromise the client's case in myriad subtle ways that are, by their
    nature, almost impossible to assess.” The United States Supreme Court made this
    similar observation in a case involving simultaneous representation of criminal
    defendants: “[A] rule requiring a defendant to show that a conflict of interests . . .
    prejudiced him in some specific fashion would not be susceptible of intelligent,
    even-handed application. . . . [I]n a case of joint representation of conflicting
    interests the evil . . . is in what the advocate finds himself compelled to refrain
    from doing . . . . [T]o assess the impact of a conflict of interests on the attorney's
    options, tactics, and decisions in plea negotiations would be virtually impossible.
    Thus, an inquiry into a claim of harmless error here would require . . . unguided
    speculation.” (Holloway v. Arkansas (1978) 
    435 U.S. 475
    , 490-491 (Holloway).)
    26
    J-M’s assertions and the high court’s discussion are fully consistent with
    our own recognition in 
    Anderson, supra
    , 211 Cal. at page 117, that simultaneous
    representation may “unconsciously” affect the decisionmaking of even well-
    intentioned attorneys. There, we expressed concern that the conflict created by an
    attorney’s dual representation of clients “might have unconsciously caused [the
    attorney] to accept an offer of compromise or settlement of [the client’s] claim” —
    rather than “sue . . . for a large sum of money, as he had previously intimated . . .
    he would do” — so as not to harm the interest of another client. (Id. at pp. 117-
    118.) Here, during discussions leading up to the engagement agreement, Sheppard
    Mullin told J-M that one of its “goal[s]” as defense counsel would be “to stop the
    ‘free ride’ by small municipalities, and to force them to spend time and resources
    to substantiate their claim.” Did Sheppard Mullin’s follow through on this
    strategy as to South Tahoe, notwithstanding its ongoing attorney-client
    relationship with that entity? Did it take action “to force” South Tahoe — its
    client in other matters — “to spend time and resources to substantiate [its] claim”
    against J-M in the qui tam action? An inquiry into this question, and more broadly
    into whether Sheppard Mullin’s simultaneous representation of J-M and South
    Tahoe harmed J-M, would require “unguided speculation.” 
    (Holloway, supra
    , 435
    U.S. at p. 491.)
    The majority says virtually nothing about this issue or J-M’s arguments,
    only briefly acknowledging as an aside that “the harm resulting from a violation of
    the duty of loyalty [is] often . . . intangible and difficult to quantify.” (Maj. opn.,
    ante, at p. 42.) Even worse, the majority ignores its own recognition of this
    common difficulty and holds that the parties now must “litigat[e]” the question
    whether the undisclosed conflict “affected the value of [Sheppard Mullin’s]
    work.” (Maj. opn., ante, at p. 42.) And the majority imposes this requirement
    without considering how extensive the additional litigation surely will be,
    including discovery battles with J-M seeking interrogatory responses and
    deposition testimony from Sheppard Mullin attorneys regarding litigation tactics
    27
    and decisionmaking. Nor does the majority discuss whether Sheppard Mullin will
    be responsible for J-M’s costs in litigating these issues, which resulted solely from
    Sheppard Mullin’s decision not to disclose its relationship to South Tahoe. Rather
    than spawn more subsidiary litigation and raise a host of unanswered questions by
    allowing for quantum meruit recovery, we should hold that such recovery is
    unavailable under the circumstances of this case.
    Finally, the other considerations the majority cites do not justify its
    conclusion that quantum meruit recovery may be available. The majority
    emphasizes that Sheppard Mullin performed “many thousands of hours of legal
    work” before its disqualification. (Maj. opn., ante, at p. 41.) Of course, Sheppard
    Mullin is solely responsible for that circumstance, because it consciously decided
    not to disclose the conflict and was disqualified by South Tahoe when the facts
    later came to light. The majority asserts that Sheppard Mullin “did seek and
    obtain J-M’s written consent to the conflict.” (Ibid.) However, as the majority
    correctly holds, because Sheppard Mullin did not disclose the existing conflict, it
    neither sought nor obtained a valid and effective waiver. The majority also asserts
    that Sheppard Mullin “may have been legitimately confused about whether South
    Tahoe was [a] current client when it took on J-M’s defense.” (Ibid.) However,
    there is no evidence in the record that Sheppard Mullin thought South Tahoe was
    only a former client. There is, however, undisputed evidence — the sworn
    declaration of its general counsel, D. Ronald Ryland — that before execution of
    the retention agreement, Sheppard Mullin ran “a conflicts check” and “identified
    South Tahoe . . . as a client in matters wholly unrelated to J-M.” According to
    other undisputed evidence, Sheppard Mullin simply concluded that, because of the
    waiver South Tahoe had signed, “there was nothing to disclose to J-M” and “there
    was no conflict” that “presented any issue regarding representing J-M in the Qui
    Tam action.” The majority also asserts that Sheppard Mullin “may in good faith
    have believed the engagement agreement’s blanket waiver provided J-M with
    sufficient information about potential conflicts of interest.” (Ibid.) However, such
    28
    a finding would seem to be inconsistent with (1) the majority’s no-nonsense and
    unqualified declaration that, “[s]imply put, withholding available information
    about a known, existing conflict is not consistent with informed consent” (
    id. at p.
    28, fn. omitted), (2) the majority’s conclusion that “at the time [it] agreed to
    represent J-M,” Sheppard Mullin “knew” it “represented a client with conflicting
    interests, South Tahoe” (
    id. at p.
    20), and (3) the majority’s statement that even
    the case law on which Sheppard Mullin now relies “was clear” that disclosure of
    conflicts “ ‘known to an attorney at the time he seeks a waiver’ ” is mandatory
    “ ‘regardless of whether the client is sophisticated’ ” (
    id. at p.
    27).
    I disagree with the majority that, notwithstanding these considerations, we
    need a trial court to determine whether Sheppard Mullin’s good faith is established
    by the absence “at the time” J-M retained Sheppard Mullin of an “explicit rule or
    binding precedent” (maj. opn., ante, at p. 42) that affirmatively and definitively
    precluded Sheppard Mullin from “withholding available information about [the]
    known, existing conflict” (
    id. at p.
    28). Procedurally, it requires no factual
    development or credibility determination to decide whether the mere absence of
    such legal authority establishes good faith, so we are in as good a position as the
    trial court to decide that issue and need not commit this determination to the trial
    court’s discretion. Substantively, I conclude that the mere absence of such legal
    authority cannot justify a finding that, because Sheppard Mullin had a “good faith”
    belief (
    id. at p.
    41) it could “withhold[] available information about [the] known,
    existing conflict” (
    id. at p.
    28), it should receive compensation. The majority’s
    contrary conclusion will tempt and encourage attorneys to take advantage of their
    asserted “confus[ion]” or the absence of authority “explicit[ly]” precluding their
    conduct (
    id. at pp.
    41-42) by testing the boundaries of their ethical obligations and
    engaging in questionable behavior that they may later attempt to justify as having
    been done in good faith. At least where the fundamental and inviolate duty of
    loyalty is at stake, we should instead adopt a rule that encourages attorneys to err
    on the side of caution, and to scrupulously honor their ethical obligations.
    29
    For the preceding reasons, I dissent insofar as the majority holds that
    Sheppard Mullin may be entitled to recover in quantum meruit the value of the
    services it rendered to J-M, notwithstanding Sheppard Mullin’s failure to disclose
    its representation of South Tahoe.
    CHIN, J.
    I CONCUR:
    CANTIL-SAKAUYE, C. J.
    30
    See last page for addresses and telephone numbers for counsel who argued in Supreme Court.
    Name of Opinion Sheppard, Mullin, Richter & Hampton, LLP v. J-M Manufacturing Company, Inc.
    __________________________________________________________________________________
    Unpublished Opinion
    Original Appeal
    Original Proceeding
    Review Granted XXX 
    244 Cal. App. 4th 590
    Rehearing Granted
    __________________________________________________________________________________
    Opinion No. S232946
    Date Filed: August 30, 2018
    __________________________________________________________________________________
    Court: Superior
    County: Los Angeles
    Judge: Stuart M. Rice
    __________________________________________________________________________________
    Counsel:
    Greines, Martin, Stein & Richland, Kent L. Richland, Barbara W. Ravitz, Robert A. Olson and Jeffrey E.
    Raskin for Defendant and Appellant.
    Steven W. Murray as Amicus Curiae on behalf of Defendant and Appellant.
    Litigation Law Group, Gordon M. Fauth, Jr., and Rosanne L. Mah for Exponential Interactive, Inc.,
    Halston Operating Company, LLC, Herbalife International of America, Inc., JDI Display America, Inc.,
    Kimberly-Clark Corporation, Leaf Group Ltd., NETGEAR, Inc., Newegg Inc., Turo Inc., Varian Medical
    Systems, Inc., and VidAngel, Inc., as Amici Curiae on behalf of Defendant and Appellant.
    Reuben Raucher & Blum, Stephen L. Raucher, Pokuaa M. Enin; Karpman & Associates and Diane L.
    Karpman for Beverly Hills Bar Association as Amicus Curiae on behalf of Defendant and Appellant.
    Amar D. Sarwal, Mary L. Blatch; Liang Ly, John K. Ly and Jason L. Liang for Association of Corporate
    Counsel as Amicus Curiae on behalf of Defendant and Appellant.
    Gibson, Dunn & Crutcher, Kevin S. Rosen, Theane Evangelis, Bradley J. Hamburger, Andrew G. Pappas,
    Heather L. Richardson and Jeremy S. Smith for Plaintiff and Respondent.
    Spertus, Landes & Umhofer, James W. Spertus and Jennifer E. LaGrange for Amici Legal Scholars as
    Amicus Curiae on behalf of Plaintiff and Respondent.
    Holland & Knight, Paul C. Workman, Peter R. Jarvis and Marissa E. Buck for Amici Law Firms as Amicus
    Curiae on behalf of Plaintiff and Respondent.
    Samuel Bellicini; Fishkin & Slatter, Jerome Fishkin; Rogers Joseph O’Donnell and Merri A. Baldwin for
    The Association of Discipline Defense Counsel as Amicus Curiae on behalf of Plaintiff and Respondent.
    Page 2 – S232946 – counsel continued
    Counsel:
    Sidley Austin, Mark E. Haddad, Joshua E. Anderson and David R. Carpenter for Professional Liability
    Insurers, AF Beazley Syndicate 623/2623 at Lloyd’s, CNA Financial Corporation, Endurance US Holdings
    Corp., and W.R. Berkley as Amici Curiae on behalf of Plaintiff and Respondent.
    Counsel who argued in Supreme Court (not intended for publication with opinion):
    Kent L. Richland
    Greines, Martin, Stein & Richland
    5900 Wilshire Boulevard, 12th Floor
    Los Angeles, CA 90036
    (310) 859-7811
    Kevin S. Rosen
    Gibson, Dunn & Crutcher
    333 South Grand Avenue
    Los Angeles, CA 90071
    (213) 229-7000
    

Document Info

Docket Number: S232946

Citation Numbers: 237 Cal. Rptr. 3d 424, 425 P.3d 1, 6 Cal. 5th 59

Filed Date: 8/30/2018

Precedential Status: Precedential

Modified Date: 1/12/2023

Authorities (18)

international-business-machines-corporation-v-howard-s-levin-and-levin , 579 F.2d 271 ( 1978 )

Flatt v. Superior Court , 9 Cal. 4th 275 ( 1994 )

Huskinson & Brown, Limited Liability Partnership v. Wolf , 9 Cal. Rptr. 3d 693 ( 2004 )

Ericksen, Arbuthnot, McCarthy, Kearney & Walsh, Inc. v. 100 ... , 35 Cal. 3d 312 ( 1983 )

Loving & Evans v. Blick , 33 Cal. 2d 603 ( 1949 )

Calvert v. Stoner , 33 Cal. 2d 97 ( 1948 )

Kidney Association of Oregon v. Ferguson , 315 Or. 135 ( 1992 )

Safeway Stores, Inc. v. Retail Clerks International Ass'n , 41 Cal. 2d 567 ( 1953 )

People Ex Rel. Deparment of Corporations. v. Speedee Oil ... , 86 Cal. Rptr. 2d 816 ( 1999 )

Birbrower, Montalbano, Condon & Frank v. Superior Court , 17 Cal. 4th 119 ( 1998 )

Cronus Investments, Inc. v. Concierge Services , 25 Cal. Rptr. 3d 540 ( 2005 )

Clark v. Millsap , 197 Cal. 765 ( 1926 )

Anderson v. Eaton , 211 Cal. 113 ( 1930 )

Concat Lp v. Unilever, Plc , 350 F. Supp. 2d 796 ( 2004 )

Burrow v. Arce , 997 S.W.2d 229 ( 1999 )

Prima Paint Corp. v. Flood & Conklin Mfg. Co. , 87 S. Ct. 1801 ( 1967 )

Holloway v. Arkansas , 98 S. Ct. 1173 ( 1978 )

Shearson/American Express Inc. v. McMahon , 107 S. Ct. 2332 ( 1987 )

View All Authorities »