Can a lawyer sue a former client when the lawyer's past work for that person was isolated and involved no confidential information?

Plain-English summary

The inquiry described attorney A, who had practiced in a community of about 5,000 for some 20 years and was regularly employed by a banking institution, B. B asked A to sue C to collect a past-due promissory note. A knew C and C's family well, and had represented C on isolated past matters: examining a title in 1950, probating the will of C's father in 1951, and handling a 1955 property sale in which A represented both buyer and seller. C had used other attorneys throughout, was represented by another attorney when the suit was filed, and had never retained A on a retainer basis.

The Committee concluded that, under those facts, A does not violate Canons 6 and 34 or any other Canon by filing and handling the suit for B against C (8-0). It reasoned that the fact A represented C on isolated occasions in the past would not in itself disqualify A, and that nothing in the stated facts indicated A obtained information of a confidential nature about C's business or affairs that would be helpful to A in representing B against C.

Currency note

This opinion was issued in 1958, under the former Texas Canons of Ethics, which the Texas Disciplinary Rules of Professional Conduct replaced effective January 1, 1990. Subsequent rule amendments or later opinions may have changed the analysis. Treat this page as historical context, not current guidance. Verify against current rules before relying on any specific rule, deadline, or requirement mentioned here.

Common questions

Q: Does past work for someone permanently bar a lawyer from later suing them?

A: The Committee concluded that isolated past representations do not in themselves disqualify the lawyer; the controlling concern was whether confidential information was obtained that would help in the new matter.

Q: What fact did the Committee treat as decisive?

A: That nothing in the stated facts indicated the lawyer had obtained confidential information about the former client's business or affairs that would be helpful in the new suit against him.

Q: Did representing both buyer and seller in the earlier sale change the result?

A: On the facts presented, the Committee found no violation in the later suit; it grounded its conclusion on the isolated nature of the prior work and the absence of helpful confidential information.

Background and rules framework

The opinion interprets former Texas Canons 6 (conflicting interests) and 34 (confidences of a client). The modern analog is ABA Model Rule 1.9 (duties to former clients), which turns on whether the new matter is the same or substantially related and whether the lawyer holds protected information from the prior representation.

Citations and references

Rules of Professional Conduct:

• MR 1.9 (duties to former clients), as the modern analog
• Texas Canons 6 and 34 (former canons on conflicting interests and confidences)

See also

• TX Ethics Op. 193: Confidences of a Client Who Witnessed a Crime
• TX Ethics Op. 219: Suing One Partner After Representing Both
• TX Ethics Op. 184: Conflicts of Interest in Public Employment

Source

• Landing page: https://www.legalethicstexas.com/resources/opinions/opinion-180/
• Original PDF: https://tcle-web.s3.amazonaws.com/public/documents/Opinion_180.pdf

Original opinion text

Reproduced from the official source for research purposes. The linked source is authoritative.

QUESTION PRESENTED

A, an attorney, practicing in a community of approximately 5,000 for some 20 years, was employed by B, a banking institution and regular client of A, to file suit against C for the collection of a past due promissory note.

C formerly resided in such community, but has lived elsewhere for the past 2 or 3 years. A is well acquainted with C, his family and his entire background by virtue of living in the same community all of his life. A had been at various times, employed by C and C's family, principally in matters of little consequence. C and his family had also used other attorneys during all of this period of time. At the time such suit was filed, C was, and had been, for several years, using another attorney other than A. A had at no time been employed by C on a retainer basis.

Specific instances of A's employment by C are as follows:
In 1950, A examined the title to certain property purchased by C.
In 1951, A handled the probate of the will of C's father.
In 1955, A, representing both Buyer and Seller, handled the sale of certain properties belonging to C.
Does A violate any of the Canons of Ethics by filing and handling the suit for B, the banking institution, against C?

18 Baylor L. Rev. 277 (1966)

CONFIDENCES OF A CLIENT
Isolated representations of a party by an attorney without obtaining confidential information does not disqualify attorney from later suing such party.

Canons 6, 34.

It is the opinion of the committee that under the facts stated in the question, A does not violate Canons 6 and 34 or any other Canons of Ethics by filing and handling the suit for B, the banking institution, against C. The fact that A represented C on isolated occasions in the past would not in itself disqualify A from bringing the suit against C. There is nothing in the facts as stated in the question which indicates that A while representing C in any matter obtained information of a confidential nature about C's business or affairs which would be helpful to him in representing B in the suit against C. (8-0.)

Tex. Comm. On Professional Ethics, Op. 180 (1958)