What Is a “Prospective Client” Under Rule 1.18 in California?
A prospective client is anyone who consults a lawyer about possibly forming a client-lawyer relationship — even if no relationship ever forms and no fee is ever paid. California’s Rule 1.18, like the ABA’s, gives that person two protections: confidentiality over what was shared, and a shield against the lawyer later showing up on the other side of the same dispute.
That sounds simple, but California Bar Exam essays live in the details: what counts as a “consultation,” how harmful the shared information has to be, and — the part where California and the ABA genuinely diverge — exactly what kind of consent cures a conflict once one exists.
The Trap: Not Every Email Creates a “Prospective Client”
Rule 1.18 only applies when a communication occurs in circumstances where a reasonable lawyer would understand the person is seeking representation, and the person has a reasonable expectation the lawyer is listening in that capacity.
- An unsolicited email dumping sensitive facts on a lawyer who never agreed to a consultation does not create Rule 1.18 protections — even if the content is highly sensitive.
- A law firm’s website intake form inviting visitors to “tell us about your case” does create a reasonable expectation of consultation, so information submitted through it is protected.
Three Protections Once a Consultation Occurs
- Confidentiality — narrower than full client confidentiality, but still binding and enforceable through discipline.
- Disqualification — the lawyer can’t later represent an adversary in the same or a substantially related matter if the consultation revealed information that would be significantly harmful to the prospective client. That’s a higher bar than the “materially adverse” standard used for former clients under Rule 1.9.
- Imputation to the firm — the conflict spreads to the whole firm, subject to the screening cure below.
Where California Requires Something Extra: The Consent Cure
Both the ABA and California let the affected client and the prospective client cure the conflict by consenting to the adverse representation. Here’s the divergence worth memorizing for the exam:
| Consent requirement | ABA Model Rule 1.18 | California Rule 1.18 |
|---|---|---|
| Form of consent | Confirmed in writing | Informed written consent, signed by the client |
| Who must consent | Both the prospective client and the new client | Both the prospective client and the new client |
| Alternative cure | Screening plus notice (see below) | Screening plus notice (see below) |
California’s insistence on a signed writing is stricter than the ABA’s “confirmed in writing” language, which can some times be satisfied by the lawyer’s own written confirmation of an oral consent. On a California essay, don’t just say “the client consented” — say whether the consent took the form California actually requires.
The Screening Cure Is Unusually Generous Here
Under ordinary lateral-hire conflicts (Rule 1.10), a firm can screen a conflict a newly arriving lawyer brings with her — but screening a lawyer who has been at the firm the whole time generally does not avoid imputation for an actual former- or current-client conflict; that typically requires consent instead.
Rule 1.18(d) breaks that pattern. It allows screening to cure imputation even for a lawyer who never left the firm, and even without the consent of the screened lawyer or her firm — the only requirements are:
- Timely implementation of the screen, as soon as the firm is on notice of the conflict;
- The screened lawyer is apportioned no fee from the matter; and
- Prompt written notice, describing the screening measures, goes to the prospective client.
No one’s agreement is required if these three conditions are met. Consent is an alternative path, not a layer added on top of screening.
Worked Example: Significantly Harmful Information
Elena consults a family-law attorney for 45 minutes about a possible divorce, disclosing the couple’s $2 million investment portfolio, her husband’s business interests, and her prenuptial agreement. The attorney declines the case: “I’m too busy.” No relationship ever forms.
Months later, Elena’s husband asks the same attorney to represent him in the divorce. Because the financial details Elena shared are clearly significantly harmful to her if used against her, the attorney is disqualified from representing the husband absent Elena’s informed written consent — signed by her, as California requires. The conflict imputes to the whole firm unless the attorney took reasonable measures to limit the information received, is timely screened, and the firm gives Elena prompt written notice.
Worked Example: General Information Isn’t Enough
Contrast that with a founder who tells three venture-capital law firms, in a first meeting, only that “we’re raising $5 million and targeting enterprise customers” — no cap table, no burn rate, no contracts. That level of generality is not significantly harmful information, so a firm that later represents a competitor against the founder is probably not disqualified. A second firm that later received the founder’s actual cap table and burn rate, by contrast, would need screening or consent before taking an adverse matter.
Common Mistakes on the Bar Exam
- Assuming a brief conversation creates no duties — Rule 1.18 attaches the moment a genuine consultation occurs.
- Treating an unsolicited, unilateral email as a “consultation” without a reasonable expectation of confidentiality.
- Believing screening requires the disqualified lawyer’s consent — it doesn’t, under Rule 1.18(d).
- Forgetting California’s stricter signed-writing requirement for the consent cure.
- Assuming one party’s consent is enough — both the prospective client and the new client must consent.
FAQ
Does an unsolicited email to a lawyer create a “prospective client” relationship?
No. Rule 1.18 requires a consultation where a reasonable lawyer would understand the person is seeking representation and the person reasonably expects the lawyer is listening in that capacity. A unilateral, unrequested email doesn’t meet that standard, even if it contains sensitive information.
What form of consent does California require to cure a prospective-client conflict?
California requires informed written consent signed by the client — stricter than the ABA’s “confirmed in writing” standard, which can sometimes be satisfied by the lawyer’s own written confirmation of an oral consent.
Can a law firm avoid disqualification without anyone’s consent?
Yes, through screening. Rule 1.18(d) lets a firm cure imputation with a timely screen, no fee-sharing with the screened lawyer, and prompt written notice to the prospective client — no consent from anyone is required if those conditions are met.
Key Takeaways
- A prospective client gets confidentiality and a conflict shield, but only if a genuine consultation occurred — not from an unsolicited email.
- Disqualification requires “significantly harmful” information, a higher bar than the “materially adverse” standard for former clients.
- California requires informed written consent signed by the client to cure a conflict — stricter than the ABA’s “confirmed in writing.”
- Screening under Rule 1.18(d) is unusually generous: it cures imputation even for a lawyer who never left the firm, without anyone’s consent, if timely and properly noticed.
- Always run three checks on an essay: was there a consultation, was the information significantly harmful, and was the cure — consent or screening — properly executed?
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.
Related guides
- California’s mandatory self-reporting duty under Section 6068(o)
- choice-of-law rules for attorney discipline under Rule 8.5
- California’s rules on paying witnesses under Rule 3.4