California Bar Conflicts of Interest
Last updated: May 2, 2026
Conflicts of Interest questions are one of the highest-leverage areas to study for the California Bar. This guide breaks down the rule, the elements you need to recognize, the named traps that catch most students, and a memory aid that scales to test day. Read it once, then practice the same sub-topic adaptively in the app.
The rule
Under California Rules of Professional Conduct (Cal. RPC) 1.7, a lawyer shall not, without informed written consent from each affected client, represent a client if the representation is directly adverse to another client in the same or a separate matter, or if there is a significant risk that the representation will be materially limited by the lawyer's responsibilities to another client, a former client, a third person, or by the lawyer's own interests. Under Cal. RPC 1.9, a lawyer who has formerly represented a client shall not thereafter represent another person in the same or a substantially related matter in which that person's interests are materially adverse to the former client without the former client's informed written consent. Cal. RPC 1.10 imputes most personal-disqualifying conflicts to all lawyers in the firm, subject to limited screening. California's regime differs from the ABA Model Rules in three high-yield ways: (1) California requires "informed written consent" — a signed writing — not merely the ABA's "confirmed in writing"; (2) Cal. RPC 1.7(d) imposes a separate disclosure-only duty for non-conflict relationships that could reasonably be expected to affect representation, even where no consent is required; and (3) Cal. RPC 1.6 confidentiality is narrower than ABA 1.6, which constrains how conflicts get cured.
Elements breakdown
Cal. RPC 1.7(a) — Concurrent Direct Adversity
A lawyer must not represent a client whose interests are directly adverse to another current client without informed written consent from each affected client.
- Lawyer represents two or more current clients
- Representation of one is directly adverse to another
- Adversity exists in same or separate matter
- Each affected client gives informed written consent
- Lawyer reasonably believes competent representation possible
Common examples:
- Suing Client A in unrelated matter while representing A on tax issue
- Representing both buyer and seller in same transaction
- Representing co-defendants with diverging defense theories
Cal. RPC 1.7(b) — Material Limitation Conflict
A lawyer must not represent a client if there is a significant risk the representation will be materially limited by responsibilities to another client, former client, third person, or the lawyer's own interests, absent informed written consent.
- Significant risk of material limitation
- Source: another client, former client, third party, or lawyer's own interest
- Lawyer reasonably believes competent representation possible
- Each affected client gives informed written consent in writing
- Representation not prohibited by law
Common examples:
- Representing two co-plaintiffs whose damages claims compete for limited insurance
- Representing client where lawyer's spouse opposes counsel
- Representing organization where lawyer holds equity stake
Cal. RPC 1.7(d) — Disclosure-Only Relationships
Even where consent is not required, a lawyer must disclose in writing relationships with parties or witnesses that the lawyer knows or reasonably should know would be relevant to the client's evaluation of the representation.
- Lawyer has legal, business, financial, professional, or personal relationship
- Relationship is with party or witness in same matter
- Relationship would be relevant to client's evaluation
- Lawyer knows or reasonably should know of it
- Written disclosure made at earliest reasonable opportunity
Cal. RPC 1.8.1 — Business Transactions With Client
A lawyer must not enter a business transaction with a client or knowingly acquire an adverse pecuniary interest unless terms are fair and reasonable, fully disclosed in a writing the client can understand, the client is advised in writing to seek independent counsel and given a reasonable chance to do so, and the client gives informed written consent to the essential terms.
- Terms fair and reasonable to client
- Terms fully disclosed in writing
- Writing transmitted in manner client can understand
- Client advised in writing to seek independent counsel
- Client given reasonable opportunity to do so
- Client gives informed written consent to essential terms and lawyer's role
Cal. RPC 1.9 — Duties to Former Clients
A lawyer who formerly represented a client must not represent another person in the same or substantially related matter where the new client's interests are materially adverse without the former client's informed written consent, and must not use or reveal the former client's confidences except as Cal. RPC 1.6 or 1.9(c) permits.
- Prior attorney-client relationship existed
- Same or substantially related matter
- New client's interests materially adverse to former client
- No informed written consent from former client
- No use or revelation of former client's confidential information
Cal. RPC 1.10 — Imputation Within Firm
While lawyers are associated in a firm, none of them shall knowingly represent a client when any one of them practicing alone would be prohibited by Rules 1.7 or 1.9, unless the prohibition is based on a personal interest and does not present a significant risk of materially limiting the representation, or screening procedures are properly implemented.
- Lawyers associated in same firm
- One lawyer disqualified under 1.7 or 1.9
- Disqualification not based solely on personal interest
- No timely written notice and screening implemented
- No informed written consent from affected client
Cal. RPC 1.11 — Former Government Lawyers
A former government lawyer must not represent a private client in a matter in which the lawyer participated personally and substantially as a public officer or employee, unless the appropriate government agency gives informed written consent; the firm may avoid imputation through timely screening and written notice.
- Lawyer formerly served as public officer or employee
- Personal and substantial participation in the matter
- Now representing private client in same matter
- No informed written consent from government agency
- If firm continues, screening and notice required
Common patterns and traps
The ABA-vs-California Writing Switch
California requires "informed written consent" — a writing signed by the client — while the ABA Model Rules permit consent that is merely "confirmed in writing" by the lawyer. The bar examiners reliably test this divergence by giving you facts where the lawyer documents the disclosure but the client never signs, then offering an answer choice that says the conflict was properly waived under "the rules of professional conduct." That choice is the trap: it would be right under ABA 1.7, wrong under California.
An answer choice reads "No, because the lawyer confirmed the conflict waiver in a follow-up email to the client" — attractive because it tracks ABA language, but California requires the client's signed writing.
The Substantial-Relationship Misfire
Candidates wrongly apply the substantial-relationship test from Cal. RPC 1.9 to current-client conflicts, or fail to apply it when a former client is involved. Cal. RPC 1.7(a) bars direct adversity to a current client even in totally unrelated matters; Cal. RPC 1.9 only bars former-client representation when the matters are substantially related and the interests are materially adverse. Mixing these up produces the wrong rule citation and a wrong-because-reason answer.
An answer reads "Permissible, because the new matter is unrelated to the prior representation" when the question involves two current clients — unrelated matters do not save you under 1.7(a).
The Imputation Escape Hatch Trap
Cal. RPC 1.10 imputes most conflicts firm-wide, but answer choices often dangle a "personal interest" exception or a screening procedure. The personal-interest exception applies only when the conflict is purely personal to one lawyer (e.g., a romantic involvement) AND does not present a significant risk of materially limiting the firm's representation. Screening under Cal. RPC 1.10 is available only for lateral hires under specific conditions — not for current-client conflicts.
"Permissible if the conflicted lawyer is screened from the matter" — attractive but wrong when the conflict arises from a current direct-adversity representation, where screening is unavailable.
The Disclosure-vs-Consent Conflation
Cal. RPC 1.7(d) imposes a disclosure-only duty for relationships that don't rise to a true conflict but could reasonably affect the client's evaluation — e.g., the lawyer's sibling works for opposing counsel's firm. Candidates either miss the duty entirely (treating it as no-conflict) or over-apply it by demanding informed written consent (treating it as a 1.7(a)/(b) conflict). The right answer requires written disclosure but not consent.
"Permissible without disclosure because the relationship is too attenuated" — wrong because Cal. RPC 1.7(d) compels written disclosure even when no consent is required.
The Non-Consentable Conflict
Some conflicts cannot be cured by consent at all — most notably, representing opposing parties in the same litigation, or where the lawyer cannot reasonably believe competent and diligent representation is possible. Bar items often offer "permissible if both clients give informed written consent" as a distractor where the conflict is structurally non-consentable.
"Permissible if both clients sign written waivers" in a fact pattern where the lawyer represents both plaintiff and defendant in the same lawsuit — no waiver cures this.
How it works
Start every conflicts question by asking three sequential questions: who is the client (current, former, or prospective), what is the source of the conflict (another client, former client, third party, or lawyer's own interest), and is the consent California-compliant. Suppose Reyes & Patel LLP represents Liu Properties, LLC in landlord-tenant matters. A new client, Chen Bakery, walks in wanting to sue a landlord — who turns out to be Liu Properties — in an unrelated commercial-lease matter. That's textbook Cal. RPC 1.7(a) direct adversity: same firm, two current clients, suing one for the other. The conflict is curable only by informed written consent from BOTH Liu and Chen, separately documented. An oral go-ahead from Liu's general counsel is not enough — California requires a signed writing. If consent fails, the conflict imputes to every lawyer in Reyes & Patel under Cal. RPC 1.10, with no personal-interest exception available because this is a representation conflict, not the lawyer's hobby or hobby-horse.
Worked examples
Should the court grant the motion to disqualify?
- A No, because Liu's general counsel confirmed in writing that the firm could proceed.
- B No, because the new matter is unrelated to any prior representation of Liu.
- C Yes, because Cal. RPC 1.7 requires informed written consent signed by Liu, and an email acknowledgment is insufficient. ✓ Correct
- D Yes, because representing a former employee against a current corporate client is a non-consentable conflict.
Why C is correct: This is a Cal. RPC 1.7(a) direct-adversity conflict: the firm represents two current clients (Liu and Chen) whose interests are directly adverse, and Cal. RPC 1.7(a) applies even though the matters are unrelated. The conflict is consentable, but California requires "informed written consent" — a writing signed by the affected client — not merely the ABA's "confirmed in writing" lawyer-side documentation. An emailed acknowledgment from in-house counsel without a signed waiver does not satisfy the rule, so disqualification is proper.
Why each wrong choice fails:
- A: This answer applies the ABA Model Rule 1.7 "confirmed in writing" standard, under which a lawyer-drafted writing memorializing the client's oral consent suffices. California rejects that approach and requires informed written consent signed by the client. (The ABA-vs-California Writing Switch)
- B: Lack of subject-matter overlap saves a former-client conflict under Cal. RPC 1.9, but Liu is a current client. Cal. RPC 1.7(a) bars direct adversity against a current client in any matter, related or not. (The Substantial-Relationship Misfire)
- D: This conflict is consentable in principle — a lawyer can represent a plaintiff against a current corporate client with both clients' informed written consent, provided the lawyer reasonably believes competent representation is possible. The defect here is the form of consent, not its availability. (The Non-Consentable Conflict)
What is the most likely result?
- A The motion is denied, because Cal. RPC 1.10 permits screening of laterally hired lawyers when timely written notice is given.
- B The motion is granted, because Garcia's prior representation is substantially related and Bayview's interests are materially adverse, and screening alone cannot cure imputation absent informed written consent. ✓ Correct
- C The motion is denied, because the prior matter settled and Garcia owes no continuing duty to Bayview.
- D The motion is granted, because Cal. RPC 1.9 prohibits any former-client matter regardless of consent.
Why B is correct: Garcia is personally disqualified under Cal. RPC 1.9: he previously represented Bayview, the new matter (zoning challenge to the same warehouse expansion) is substantially related to the prior lease and side-agreement, and Bayview's interests are materially adverse to the Port Authority. Garcia's disqualification imputes to Reyes Trial Group under Cal. RPC 1.10. Although California permits screening of laterally hired lawyers in narrow circumstances, screening does not substitute for informed written consent when the conflict involves a substantially related matter where confidential information is likely material. Without Bayview's signed waiver, the firm is disqualified.
Why each wrong choice fails:
- A: This overstates Cal. RPC 1.10's screening allowance. Screening is available for laterally hired lawyers in limited situations, but it does not cure a substantial-relationship conflict where confidential information is at stake without the former client's informed written consent. (The Imputation Escape Hatch Trap)
- C: Settlement of the prior matter does not extinguish duties under Cal. RPC 1.9. The duty of confidentiality and the substantial-relationship bar survive termination of the representation indefinitely. (The Substantial-Relationship Misfire)
- D: Cal. RPC 1.9 conflicts are generally consentable with the former client's informed written consent. They are not categorically barred. The defect here is the absence of consent, not the unavailability of consent. (The Non-Consentable Conflict)
Has Liu violated the California Rules of Professional Conduct?
- A No, because Liu reasonably believed her relationship with Mateo would not materially limit her representation of Patel.
- B No, because Cal. RPC 1.7 only requires written consent for relationships that rise to the level of a material limitation.
- C Yes, because Cal. RPC 1.7(d) requires written disclosure of relationships with witnesses that the lawyer should reasonably know are relevant to the client's evaluation, regardless of whether a conflict exists. ✓ Correct
- D Yes, because Cal. RPC 1.7(b) bars representation whenever a lawyer has any familial relationship with a witness.
Why C is correct: Cal. RPC 1.7(d) imposes a freestanding written-disclosure duty for legal, business, financial, professional, or personal relationships with parties or witnesses that the lawyer knows or reasonably should know would be relevant to the client's evaluation of the representation. This duty applies even when no true conflict exists and no informed written consent is required. A first-cousin relationship with a key adverse witness is plainly the kind of personal relationship Patel would want to know about. Liu's failure to disclose in writing violates Cal. RPC 1.7(d), even though she reasonably believed no material limitation existed.
Why each wrong choice fails:
- A: Reasonable belief in non-limitation excuses Liu from the consent requirement under Cal. RPC 1.7(b), but it does not excuse the separate written-disclosure duty under Cal. RPC 1.7(d). The two subsections operate independently. (The Disclosure-vs-Consent Conflation)
- B: This conflates the consent trigger with the disclosure trigger. Cal. RPC 1.7(d) is precisely the rule for relationships that fall short of a material limitation but still warrant client awareness — disclosure is required even without consent. (The Disclosure-vs-Consent Conflation)
- D: Cal. RPC 1.7(b) requires a significant risk of material limitation, not the bare existence of a familial tie. Many witness relationships do not materially limit representation; the rule is fact-specific, not categorical. (The Substantial-Relationship Misfire)
Memory aid
"WIN-WIN": **W**ritten consent, **I**nformed, **N**arrow representation possible — **W**aiver from each affected client, **I**mputation across firm, **N**o non-consentable conflicts (e.g., one client suing another in same litigation). If you cannot write "WIN" twice, the conflict is not cured.
Key distinction
Distinguish Cal. RPC 1.7 (current-client conflicts — "directly adverse" or "materially limited") from Cal. RPC 1.9 (former-client conflicts — "substantially related matter" + "materially adverse"). Current-client conflicts trigger even in unrelated matters; former-client conflicts require subject-matter overlap. Confusing the two leads candidates to wrongly apply the substantial-relationship test to current clients or wrongly demand it for former clients.
Summary
Under Cal. RPC 1.7 and 1.9, a lawyer must obtain informed written consent — a signed writing — from each affected current or former client before undertaking representation that creates direct adversity, material limitation, or substantial-relationship adversity, with conflicts imputed firm-wide under Cal. RPC 1.10.
Practice conflicts of interest adaptively
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Start your free 7-day trialFrequently asked questions
What is conflicts of interest on the California Bar?
Under California Rules of Professional Conduct (Cal. RPC) 1.7, a lawyer shall not, without informed written consent from each affected client, represent a client if the representation is directly adverse to another client in the same or a separate matter, or if there is a significant risk that the representation will be materially limited by the lawyer's responsibilities to another client, a former client, a third person, or by the lawyer's own interests. Under Cal. RPC 1.9, a lawyer who has formerly represented a client shall not thereafter represent another person in the same or a substantially related matter in which that person's interests are materially adverse to the former client without the former client's informed written consent. Cal. RPC 1.10 imputes most personal-disqualifying conflicts to all lawyers in the firm, subject to limited screening. California's regime differs from the ABA Model Rules in three high-yield ways: (1) California requires "informed written consent" — a signed writing — not merely the ABA's "confirmed in writing"; (2) Cal. RPC 1.7(d) imposes a separate disclosure-only duty for non-conflict relationships that could reasonably be expected to affect representation, even where no consent is required; and (3) Cal. RPC 1.6 confidentiality is narrower than ABA 1.6, which constrains how conflicts get cured.
How do I practice conflicts of interest questions?
The fastest way to improve on conflicts of interest is targeted, adaptive practice — working questions that focus on your specific weak spots within this sub-topic, getting immediate feedback, and revisiting items you missed on a spaced-repetition schedule. Neureto's adaptive engine does this automatically across the California Bar; start a free 7-day trial to see your sub-topic mastery climb in real time.
What's the most important distinction to remember for conflicts of interest?
Distinguish Cal. RPC 1.7 (current-client conflicts — "directly adverse" or "materially limited") from Cal. RPC 1.9 (former-client conflicts — "substantially related matter" + "materially adverse"). Current-client conflicts trigger even in unrelated matters; former-client conflicts require subject-matter overlap. Confusing the two leads candidates to wrongly apply the substantial-relationship test to current clients or wrongly demand it for former clients.
Is there a memory aid for conflicts of interest questions?
"WIN-WIN": **W**ritten consent, **I**nformed, **N**arrow representation possible — **W**aiver from each affected client, **I**mputation across firm, **N**o non-consentable conflicts (e.g., one client suing another in same litigation). If you cannot write "WIN" twice, the conflict is not cured.
What's a common trap on conflicts of interest questions?
Treating ABA "confirmed in writing" as sufficient when California requires "informed written consent"
What's a common trap on conflicts of interest questions?
Missing the substantial-relationship test under Cal. RPC 1.9 when facts overlap
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