Rule RPC 1.9 - Duties to Former Clients(a) A lawyer who has represented a client in a matter shall not thereafter represent another client in the same or a substantially related matter in which that client's interests are materially adverse to the interests of the former client unless the former client gives informed consent confirmed in writing.(b) A lawyer shall not knowingly represent a person in the same or a substantially related matter in which a firm with which the lawyer formerly was associated had previously represented a client, (1) whose interests are materially adverse to that person; and(2) about whom the lawyer, while at the former firm, had personally acquired information protected by RPC 1.6 and RPC 1.9(c) that is material to the matter unless the former client gives informed consent, confirmed in writing. Notwithstanding the other provisions of this paragraph, neither consent shall be sought from the client nor screening pursuant to RPC 1.10 permitted in any matter in which the attorney had sole or primary responsibility for the matter in the previous firm.
(c) A lawyer who has formerly represented a client in a matter or whose present or former firm has formerly represented a client in a matter shall not thereafter: (1) use information relating to the representation to the disadvantage of the former client except as these Rules would permit or require with respect to a client, or when the information has become generally known; or(2) reveal information relating to the representation except as these Rules would permit or require with respect to a client.(d) A public entity cannot consent to a representation otherwise prohibited by this Rule.Adopted July 12, 1984 to be effective 9/10/1984; caption amended, paragraphs (a) and (b) amended, and new paragraphs (c) and (d) added November 17, 2003 to be effective 1/1/2004.