May a lawyer represent a longtime client in divorce against a spouse the lawyer once represented in a municipal case?

Short answer The opinion found no apparent Rule 4-1.9 conflict on the stated facts because the prior representation yielded no information usable against the spouse. It reserved court disqualification and independent fact-finding on a complaint.

Bar

MOLEC

Issued

1997

Apply this to your situation

This page answers the general question as of 1997. Ask about yours and see what the current Missouri Rules of Professional Conduct say for your facts, with citations.

How much weight this carries: Under Missouri Supreme Court Rule 5.30, formal opinions are binding; informal opinions are advisory. Source.

About this page: The plain-English summary, reader guidance, and Q&A below were written by Ezel based on the official ethics opinion. The original opinion (linked on this page) is the authoritative source for any reliance.

Plain-English summary

The lawyer had represented the wife for about twenty years. During her marriage, the lawyer once represented her husband on a municipal matter. The lawyer said no information from that work could be used against the husband in the current dissolution.

The answer says no Rule 4-1.9 conflict appeared based on those facts. It explicitly leaves a court able to decide a disqualification motion and says a complaint would be investigated independently to determine the facts.

Currency note

This opinion was issued in 1997, before Missouri's 2007 revisions to the Rules of Professional Conduct. Subsequent rule amendments or later opinions may have changed the analysis. Treat this page as historical context and verify current rules before relying on it.

Common questions

Q: Did the former municipal representation create a conflict on the facts given?

A: The opinion says no conflict appeared under Rule 4-1.9.

Q: Could a court still disqualify the lawyer?

A: Yes. The opinion expressly preserves the court's ability to rule on a disqualification motion.

Q: Would the opinion control a later complaint?

A: No. It says a complaint would trigger independent fact-finding.

Background and rules framework

The opinion applies Rule 4-1.9 to adverse representation involving a former client and relies on the stated absence of information usable against him.

Citations and references

Missouri Rules of Professional Conduct:

Rule 4-1.9

Source

Landing page: https://mo-legal-ethics.org/informal-opinion/970194/
Rule revision reference: Missouri Informal Opinion 20030007

Original opinion text

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

QUESTION: Attorney represents Wife in a dissolution proceeding. Attorney has represented Wife for approximately twenty years. Wife married Husband sixteen years ago and during the marriage Attorney represented Husband once on a municipal matter. No information was obtained from Husband or from Attorney´s representation of him that could be used against Husband in the dissolution. Does Attorney have a conflict of interest? ANSWER: Based upon the information Attorney has provided, it does not appear that Attorney has a conflict of interest under Rule 4–1.9. However, this opinion does not, in any way, affect the ability of the court to rule on a motion to disqualify. Additionally, if a complaint is received, it would be investigated to determine the facts independently.

What do the rules say today, for your facts?

This opinion is from 1997. Ezel checks the current Missouri Rules of Professional Conduct against your situation and cites the rules it relies on.

Opens in Ezel Pro.

Checks the law as it stands today, not only this page
Cites every source it relies on, so you can verify it
Chat, drafting and research in one workspace