Conflict Waivers in Retainer Agreements Require Fact-Proven “Informed Consent” to Bar Malpractice Claims (and Substantial-Factor Causation Can Reach Divorce-Related Financial Harm)

Case: Lisa Grattan v. David A Handler P.C. (3d Cir. July 20, 2026) (not precedential)
Court: United States Court of Appeals for the Third Circuit
Posture: Appeal from summary judgment for attorney-defendants and from an order affirming discovery rulings.

1. Introduction

This case arises out of joint estate-planning representation of spouses who later entered a protracted and contentious divorce. Appellant Lisa Grattan sued estate-planning attorney David A. Handler (and his professional corporation) alleging that, during the joint representation, Handler favored the husband (Robert Moriarty), failed to disclose information relevant to conflicts and marital assets, and thereby contributed to financial harm discovered during the divorce (including debt instruments bearing allegedly forged signatures).

The appeal presented five principal issues: (1) whether Grattan preserved a separate breach-of-fiduciary-duty claim; (2) how the retainer’s “Joint Relationship” communications clause should be construed; (3) whether a conflicts/waiver provision in the retainer was enforceable as an “informed consent” waiver; (4) whether causation/damages evidence was sufficient for malpractice, including two damages theories (reduced marital estate via “forged debt” and increased divorce fees); and (5) whether the district court abused its discretion in affirming a magistrate judge’s discovery rulings.

2. Summary of the Opinion

• Discovery order affirmed: The Third Circuit upheld the district court’s affirmance of the magistrate judge’s discovery rulings.
• Breach-of-fiduciary-duty dismissal affirmed (forfeiture): Grattan forfeited the argument that she pled a separate, independent fiduciary-duty claim by not raising it in response to summary judgment in the district court.
• Joint-representation communications clause upheld: The retainer’s Joint Relationship provision permitted communications through one spouse without an “explicit consent” requirement.
• Conflict waiver not dispositive at summary judgment: Disputed facts—heightened by later-developed expert opinions—prevented the court from holding that Grattan gave informed consent to the conflict waiver; thus, the waiver did not categorically bar malpractice at the summary-judgment stage.
• Malpractice claim revived in part (damages): Summary judgment was reversed on the malpractice theory tied to financial harm from the “forged debt” reducing the marital estate; it was affirmed as to claimed damages consisting of increased divorce legal fees because the record support was too speculative/insufficient.
• Remand ordered: The case returns for further proceedings on the surviving malpractice theory.

3. Analysis

3.1 Precedents Cited (and How They Shaped the Decision)

Appellate standards and procedure

• AstraZeneca Pharms. v. Sec'y U.S. Dep't of Health & Hum. Servs., 137 F.4th 116 (3d Cir. 2025): Cited for plenary review of summary judgment. It frames the appellate lens—no deference on legal conclusions, viewing facts in the nonmovant’s favor.
• Anderson v. Liberty Lobby, Inc., 477 U.S. 242 (1986): Supplies the “reasonable jury” formulation for a genuine dispute of material fact—central to the court’s decision to allow a jury to decide informed consent and causation on the forged-debt theory.
• Cornelius v. CVS Pharmacy Inc., 133 F.4th 240 (3d Cir. 2025), cert. denied, 146 S. Ct. 193 (2025): Used for the abuse-of-discretion standard governing discovery orders, supporting affirmance of the challenged discovery ruling.
• Simko v. United States Steel Corp, 992 F.3d 198 (3d Cir. 2021) and Barna v. Bd. of Sch. Directors of Panther Valley Sch. Dist., 877 F.3d 136 (3d Cir. 2017): These cases anchor the forfeiture doctrine and the “truly exceptional circumstances” threshold for excusing forfeiture. They drove affirmance of the fiduciary-duty dismissal because Grattan did not press a separate-claim theory in the district court.
• Pub. Int. Rsch. Grp. of New Jersey, Inc. v. Magnesium Elektron, Inc., 123 F.3d 111 (3d Cir. 1997): Provides the law-of-the-case framework and the “new evidence” exception. The panel used it to critique the district court’s reliance on law-of-the-case after expert opinions were later introduced.
• Saint-Jean v. Palisades Interstate Park Comm'n, 49 F.4th 830 (3d Cir. 2022): Clarifies that an appellate court is not bound by a district court’s law-of-the-case application—supporting the Third Circuit’s willingness to reassess enforceability issues.
• Murray v. Bledsoe, 650 F.3d 246 (3d Cir. 2011) (per curiam): Invoked for the principle that an appellate court may affirm on any basis supported by the record—used when the court affirmed dismissal of the divorce-fees damages theory on evidentiary insufficiency rather than the district court’s reasoning.

New Jersey attorney torts and retainer/conflicts principles

• Packard-Bamberger & Co. v. Collier, 771 A.2d 1194 (N.J. 2001): Cited for the proposition that legal malpractice and breach of fiduciary duty can be independent torts against attorneys, while also recognizing that fiduciary-duty breaches may be litigated within malpractice. This underlies the court’s discussion of pleading ambiguity and forfeiture.
• Delaney v. Dickey, 242 A.3d 257 (N.J. 2020): A core driver of the conflicts analysis. The panel emphasized Delaney’s teaching that a retainer agreement is not an ordinary contract, must conform to the Rules of Professional Conduct, requires “scrupulous fairness and transparency,” and places the burden on the attorney to prove fairness and reasonableness.
• Balducci v. Cige, 223 A.3d 1229 (N.J. 2020): Used in two ways: (1) to confirm courts may consider negotiation circumstances and client sophistication when evaluating retainer validity; and (2) to apply the canon that ambiguous fee/retainer provisions are construed in favor of the client. The panel also used sophistication to reject Grattan’s claim she needed the Joint Relationship clause “explained,” while simultaneously noting that sophistication does not substitute for disclosure of unknown conflict facts.
• Lahoud v. Anthony & Sylvan Corp., 330 A.3d 803 (N.J. App. Div. 2025): Cited for de novo review of contract enforceability questions (as applied to the retainer provision).
• Baxt v. Liloia, 714 A.2d 271 (N.J. 1998): Supports using the RPCs as relevant evidence/standards in civil attorney-liability litigation even if RPC violations are not, standing alone, an independent cause of action.

New Jersey malpractice elements, causation, and damages

• McGrogan v. Till, 771 A.2d 1187 (N.J. 2001): Supplies the canonical three elements of malpractice—duty, breach, and proximate causation/damages—structuring the court’s merits analysis.
• Gilbert v. Stewart, 255 A.3d 1101 (2021): The opinion’s causation centerpiece. The panel used Gilbert’s articulation of proximate cause, foreseeability, and the substantial-factor test (especially for concurrent causes) to justify sending the forged-debt causation question to a jury despite multiple contributing actors and indirect pathways.
• Morris Props., Inc., v. Wheeler, 300 A.3d 980 (N.J. App. Div. 2023): Cited for the proposition that expert testimony ordinarily is required to establish proximate causation in legal-malpractice cases, reinforcing that a factfinder typically resolves causation disputes.
• Grunwald v. Bronkesh, 621 A.2d 459 (N.J. 1993): Used to reject speculative damages: recoverable damages must be “real and substantial,” and arise from detrimental reliance on negligent advice. This was central to affirming dismissal of the divorce-fees damages theory.

3.2 Legal Reasoning

A. Forfeiture: pleading ambiguity does not preserve a theory never argued

Although New Jersey recognizes both malpractice and breach of fiduciary duty as potentially independent torts (Packard-Bamberger & Co. v. Collier), the Third Circuit treated the dispositive issue as procedural: Grattan litigated the case in the district court as “a legal malpractice action” and did not argue, in response to summary judgment, that she had an additional standalone fiduciary-duty claim that required separate adjudication. Under Simko v. United States Steel Corp, that omission forfeited the argument on appeal, and Barna v. Bd. of Sch. Directors of Panther Valley Sch. Dist. supplied the stringent standard for excusing forfeiture—one the panel found unmet.

B. Contract construction: the Joint Relationship provision allowed channeling communications

The panel affirmed the district court’s reading that the retainer’s Joint Relationship provision authorized Handler to communicate through either spouse and to respond to the designated communicator, without an additional “explicit consent” requirement. Importantly, the court separated this contract point from broader fiduciary and ethics issues: even if channeling communications is contractually allowed, conflict disclosures and informed consent remain governed by ethical standards and factual disclosures.

The court also rejected Grattan’s argument that the provision had to be explained to her, emphasizing the clause’s plain language and her sophistication as an experienced civil litigator (citing Balducci v. Cige for considering sophistication in retainer validity).

C. Conflict waivers and “informed consent”: factual disputes defeated summary judgment

The most consequential reasoning concerns whether the retainer’s conflicts provision validly waived conflicts and restricted information-sharing about Handler’s concurrent work for a related party (Eileen Moriarty). The district court had treated the waiver as dispositive (both for discovery and for the merits), but the Third Circuit held that the enforceability question could not be resolved on the present record.

Drawing heavily on Delaney v. Dickey, the panel stressed:

• a retainer is not an “ordinary contract,”
• it must conform to the RPCs,
• the lawyer bears the burden to prove fairness and reasonableness, and
• the lawyer must make disclosures sufficient for “informed decisions.”

The panel highlighted that “informed consent” depends on what the lawyer disclosed before the client agreed, referencing the definition in N.J. R.P.C. 1.0(e) and the duty to explain matters under N.J. R.P.C. 1.4(c). While the opinion does not reproduce the redacted content of the conflicts clause or certain factual details, it makes the key point that a jury could find that material, conflict-related facts were not disclosed—rendering the waiver unenforceable and preventing it from barring malpractice at summary judgment.

Procedurally, the panel also questioned the district court’s law-of-the-case reliance because expert opinions (from Rich and Goldman) were developed later and directly addressed informed consent. Under Pub. Int. Rsch. Grp. of New Jersey, Inc. v. Magnesium Elektron, Inc., new evidence can justify revisiting earlier rulings; and under Saint-Jean v. Palisades Interstate Park Comm'n, the appellate court is not constrained by law-of-the-case in reviewing trial-court rulings.

D. Causation and damages: substantial-factor causation saved one theory, while speculation killed the other

The panel accepted that duty was undisputed and the district court found enough evidence of breach; the appeal therefore turned on proximate cause and damages under McGrogan v. Till.

(1) Forged-debt / reduced-marital-estate theory: triable issue under substantial-factor test

The district court treated the Marital Settlement Agreement as foreclosing loss, reasoning (in substance) that the settlement allocation eliminated harm. The Third Circuit disagreed that the MSA necessarily extinguished damages as a matter of law: even if the debt was not paid directly by Grattan, evidence (including expert damages opinion) could support that the existence of the forged debt reduced the marital estate and thus her equitable distribution.

The court recognized the causal chain was “far from direct,” but applied Gilbert v. Stewart to emphasize that the substantial-factor test accommodates concurrent causes and intervening steps and does not require an “unsevered connecting link.” With that framework, a reasonable jury could find Handler’s conduct a substantial factor in bringing about the financial injury, so summary judgment was improper on this damages theory.

(2) Increased divorce legal fees theory: affirmed dismissal for lack of non-speculative proof

The panel affirmed summary judgment against Grattan on her claim for increased divorce legal fees, but it did so primarily because the record evidence did not establish a non-speculative injury attributable to Handler (invoking Grunwald v. Bronkesh). The opinion notes the expert analysis did not adequately account for confounding factors and did not bridge the gap between alleged nondisclosures and the amount of fees claimed as incremental harm.

The panel therefore held that, on this record, Grattan could not pursue those fees as malpractice damages—even while clarifying (in a footnote) that the MSA resolved claims between spouses and did not, by itself, release claims against Handler, a non-party to the divorce.

E. Discovery: affirmance on procedural ground within discretion

Applying the abuse-of-discretion standard from Cornelius v. CVS Pharmacy Inc., the Third Circuit affirmed the district court’s ruling that upheld the magistrate judge’s discovery orders. A key ground was Grattan’s failure to comply with the magistrate judge’s directive to file a motion to enforce the underlying subpoena—an adequate procedural basis to deny relief.

3.3 Impact

• Conflict waivers in joint estate planning face meaningful “informed consent” scrutiny: Even when a retainer contains broad conflicts language, courts may require lawyer-proven, fact-specific disclosures demonstrating informed consent—often making enforceability unsuitable for summary judgment when disclosures are disputed.
• Ethics standards operate as enforceability constraints on contracts: By foregrounding Delaney v. Dickey and RPC concepts, the opinion reinforces that retainers are ethically-conditioned instruments, not merely private bargains.
• Divorce-adjacent malpractice damages can survive settlement formalities: A marital settlement does not automatically negate a malpractice plaintiff’s ability to prove economic harm; damages may be framed as diminution of the marital estate even if a settlement “allocates” the diminished estate.
• But “divorce fees” damages require disciplined proof: The court’s insistence on non-speculative causation and quantification signals that “the divorce took longer and cost more” is not enough without a supported methodology isolating incremental fees attributable to the alleged malpractice.
• Procedural rigor matters: The forfeiture holding and the discovery affirmance underline that malpractice plaintiffs must preserve theories and comply with subpoena enforcement mechanics; appellate courts will not repair strategic or procedural omissions.

4. Complex Concepts Simplified

• “Informed consent” (conflicts waiver): Not simply signing a waiver. It means the client agreed after the lawyer provided adequate information about (i) the material risks of the conflict and (ii) reasonably available alternatives. If key facts were not disclosed, the waiver may be unenforceable.
• “Law of the case”: A doctrine encouraging courts not to re-decide issues already resolved earlier in the same litigation. It is not absolute; new evidence can justify revisiting the issue, and appellate courts are not bound by a trial court’s earlier ruling.
• “Substantial-factor” causation: When multiple causes contribute to harm, the question becomes whether the defendant’s conduct was an important/meaningful contributor—not necessarily the only cause and not requiring a perfectly direct chain.
• “Forfeiture” on appeal: If a party does not raise an argument in the trial court when it should have, the party typically cannot raise it for the first time on appeal.
• “Summary judgment”: A case-ending ruling without trial, appropriate only when no reasonable jury could find for the nonmoving party on a material fact issue.

5. Conclusion

The Third Circuit’s decision narrows and clarifies what an attorney-defendant can accomplish through retainer-drafted conflict waivers at the summary-judgment stage: a waiver’s enforceability depends on fact-intensive, ethics-infused “informed consent” disclosures that—when disputed—are for a jury to assess. On causation and damages, the panel applied New Jersey’s substantial-factor framework to permit a malpractice claim to proceed where evidence supported that allegedly undisclosed, forged debt diminished the marital estate, while simultaneously rejecting a less supported claim for increased divorce legal fees as too speculative on this record. Procedurally, the decision also underscores that theory preservation and discovery enforcement steps can be outcome-determinative.