Follow the attached sample. A disengagement letter serves to make clear that a client has ceased to be a current client for conflict of interest analysis.When you've sustained property damage and the defendant does not have insurance, you will have to file a small court claim. I deposited the Notice of Withdrawal of Attorney of Record in the United States mail, in a sealed envelope with postage fully prepaid. In this article, we'll explain when and how you should terminate your lawyer-client relationship. We'll even provide a sample termination letter. This article addresses the rules governing California lawyers who seek to withdraw or disengage from representing a client in civil proceedings. Dent practice to send a termination letter to the client. The Rules of Professional Conduct do not specify how long an attorney should keep a client's files.