Skip to main content

Rule 1.9 Duties to Former Clients

Client-Lawyer Relationship

(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.

(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 had acquired information protected by Rules 1.6 and 1.9(c) that is material to the matter; unless the former client gives informed consent, confirmed in writing.

(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 confidential 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 confidential information relating to the representation except as these Rules would permit or require with respect to a client.

Amendment history: Amended and effective December 17, 1990; amended April 11, 2006, effective July 1, 2006; amended August 5, 2014, effective October 6, 2014; amended February 6, 2024, effective April 15, 2024. Onus on attorney to consult. — The onus is on the attorney under Rule 1.9(a) to consult with his former and current clients and seek their consent to any subsequent adversarial representation. Bevan v. Fix, 2002 WY 43, 42 P.3d 1013, 2002 Wyo. LEXIS 46 (Wyo. 2002). Rule violated. — Attorney’s representation of bank in pending action deemed contrary to rule and court erred in not granting motion to disqualify. See Carlson v. Langdon, 751 P.2d 344, 1988 Wyo. LEXIS 22 (Wyo. 1988). In a dispute regarding a subdivision’s protective covenants, a law firm representing the homeowners’ association was subject to disqualification under this section and Wyo. R. Prof. Conduct 1.10(a) because the litigation was substantially related to previous negotiations about the covenants, in which one of the firm’s attorneys had represented the owner. Although the district court did not err in denying the disqualification motion as untimely, it should have denied attorney fees as inequitable under Wyo. Stat. Ann. § 1-14-126(b) because the firm had a conflict of interest and had failed to segregate allowable fees from those relating to the disqualification motion. Magin v. Solitude Homeowner’s, Inc., 2011 WY 102, 255 P.3d 920, 2011 Wyo. LEXIS 103 (Wyo. 2011). Attorney’s attachment of a lien statement and a copy of her complete billing records containing confidential client information violated professional conduct rules and resulted in a 30 day suspension because the attorney was not entitled to the fees claimed and did not file the lien in accordance with the law. Therefore, the breach of client confidentiality was not justified. Bd. of Prof’l Responsibility v. Casper, 2014 WY 22, 318 P.3d 790, 2014 Wyo. LEXIS 27 (Wyo. 2014). Rule not violated. — Although defendant’s original attorney was employed as a prosecutor by the time the State prosecuted defendant’s case, the prosecution and the original attorney did not violate Wyo. R. Prof. Conduct 1.9 and 1.11, as the original attorney did not prosecute defendant and did not reveal confidential information about defendant to the prosecutor. Hart v. State, 2003 WY 12, 62 P.3d 566, 2003 Wyo. LEXIS 13 (Wyo. 2003). Prosecuting attorney’s office must make a showing, on the record, that a defense attorney who became a prosecutor was screened from the prosecution of the former client. Hart v. State, 2003 WY 12, 62 P.3d 566, 2003 Wyo. LEXIS 13 (Wyo. 2003). An attorney’s representation of the former chief executive officer of a manufacturer of racing safety equipment in a suit against a car racing association following the attorney’s investigation for the manufacturer of a possible suit against the racing association, which the manufacturer decided against pursuing, was not materially adverse to the manufacturer’s interests, as a former client, and did not interfere with the attorney’s duties of loyalty and confidentiality to the manufacturer. Simpson Performance Prods., Inc. v. Horn, 2004 WY 69, 92 P.3d 283, 2004 Wyo. LEXIS 83 (Wyo. 2004). Civil liability for breach of fiduciary duty. — The fiduciary duties of confidentiality and loyalty an attorney owes to a former client embodied in Rules 1.6 and 1.9 are a codification of the common law, and a breach of those fiduciary duties owed to former clients gives rise to potential civil liability to the former client within the framework of a legal malpractice action. Bevan v. Fix, 2002 WY 43, 42 P.3d 1013, 2002 Wyo. LEXIS 46 (Wyo. 2002).