What is a “material error?” First, an error is material if a disinterested lawyer would conclude the mistake is reasonably likely to harm or prejudice a client. Ultimately, this is a case-by-case, fact-specific inquiry, but it is a lesser standard than a mistake giving rise to a legal malpractice claim. The second alternative is where the mistake is of such a nature that a disinterested lawyer would conclude the mistake would reasonably cause a client to consider terminating the representation in the absence of any harm or prejudice. The mistake does not have to be so extreme that it would cause the client to terminate the representation, only that the client would consider terminating the representation.
The next question is when the lawyer should disclose the mistake. It will depend on the magnitude of the mistake and the immediacy of the resulting harm. In many cases, the lawyer can try to fix the mistake before disclosing, provided the lawyer does so promptly. The lawyer can also consult with in-house counsel or ethics counsel before disclosing the mistake to the client.
The duty to disclose mistakes applies only to current clients. Under Model Rule 1.4, an attorney has no ethical obligation to tell a former client about material errors. It does not matter if the error is fixable. It does not matter if the error will cause immediate and irreparable harm to the former client. But, distinguishing between current and former clients is not always easy. If your firm represents the client in multiple matters, the client is a current client even if the error happened in a case that has long-since ended. If you or your firm handles all matters for a client in a specific practice area, the client may be a current client even if there are no active matters. If you or your firm act as general counsel for a client, that client is a current client even if a substantial amount of time has passed since services were last rendered.
The same is true for what the Standing Committee referred to as “episodic clients.” This is a client that hires you whenever the client requires legal representation, but the client’s legal needs are not constant or continuous. Episodic clients may be current clients if the client reasonably expects that the professional relationship will span any intervals and that the lawyer will be available when the client next needs representation. But, if it is one-time representation on a discreet matter or litigation, there is no ethical duty under the Model Rules to disclose material errors once the representation ends.
Keep the foregoing in mind, should you need to address such a situation.