The lawyer should send a disengagement letter to establish that the relationship is no longer continuing, and to refer the client to another lawyer. An end of representation letter serves as a professional and ethical marker to indicate the end of a specific attorney-client relationship.Writing a termination letter to an attorney requires clarity, formality, and a record of the decision to end the legal representation. Need to write an attorney closing letter to clients? In this article, we'll explain when and how you should terminate your lawyer-client relationship. We'll even provide a sample termination letter. The new attorney can send a letter to the former attorney about the termination of services. Otherwise, it will be up to the client to do so. A lawyer may withdraw from representation in some circumstances including those where they have the client has reached their financial obligation. If a file has been closed for less than six years, you may only destroy it with the consent of the client.