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The Daily Insight

What is the rule about representing a client whose interests may be adverse to a former client?

Author

Sarah Duran

Published Mar 28, 2026

(a) A lawyer who has formerly represented a client in a matter 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 interests of the former client unless the former client gives informed consent, confirmed in writing.

Does Rule 1.6 apply to former clients?

Under those circumstances, paragraph (a) prohibits disclosure unless the client or former client gives informed consent. A lawyer’s fiduciary duty to the lawyer’s firm may also govern a lawyer’s conduct when exploring an association with another firm and is beyond the scope of these Rules.

Can I sue a former client?

An attorney may be entitled to bring suit against a former client, so long as representation of the former client has ended and the present case does not involve any confidential communications made to the attorney by the former client. The defendant is a former client of the plaintiff’s lawyer in a divorce action.

What is Rule 1.09 of the Code of Ethics?

1. Rule 1.09 addresses the circumstances in which a lawyer in private practice, and other lawyers who were, are or become members of or associated with a firm in which that lawyer practiced or practices, may represent a client against a former client of that lawyer or the lawyer’s former firm.

Is it possible or ethical for a lawyer to represent both parties at the closing?

As per the laws of the Law Society, an attorney cannot represent both parties simultaneously to avoid any possibility of conflict of interest. They also have a lot of ethical responsibilities and the same lawyer representing both parties may not be able to serve the best interests of both parties simultaneously.

When can a lawyer ethically reveal client confidences?

(a) A lawyer shall not reveal information relating to the representation of a client unless the client gives informed consent, the disclosure is impliedly authorized in order to carry out the representation or the disclosure is permitted by paragraph (b).

Can a client waive an actual conflict of interest?

When a law firm agrees to represent a client in a particular matter, it may ethically request that the client waive future conflicts of interest, including that the client consent to allow the law firm to bring adverse litigation on behalf of another current client, if (a) the law firm appropriately discloses the …

What happens when a lawyer has a conflict of interest?

A conflict of interest exists, however, if there is a significant risk that a lawyer’s action on behalf of one client will materially limit the lawyer’s effectiveness in representing another client in a different case; for example, when a decision favoring one client will create a precedent likely to seriously weaken …

Is conflict of interest illegal?

Legality. The key thing to consider with a conflict of interest is disclosure. However, if the conflict of interest activity was disapproved and the individual continued despite this, or never it disclosed in the first place, it could be considered illegal.

Can the confidentiality between attorney and client be lost?

The privilege protecting an attorney-client communication may be lost in several ways, but perhaps most often by the intentional or inadvertent production of the communication to a third party.

Can attorneys sleep with clients?

California currently bars attorneys from coercing a client into sex or demanding sex in exchange for legal representation. The new rule would completely ban sex between lawyers and clients unless the sexual relationship preceded the professional relationship or the client is the lawyer’s spouse or domestic partner.