In this article, we'll explain when and how you should terminate your lawyer-client relationship. We'll even provide a sample termination letter.Need to write an attorney closing letter to clients? In accordance with Local Rule. Writing a termination letter to an attorney requires clarity, formality, and a record of the decision to end the legal representation. In the disengagement letter, the lawyer should warn the client of applicable time limitations, deadlines, and uncompleted investigation or casework. Be Clear: Be direct and get straight to the point. Clearly state that you are terminating the attorney and briefly state the reasons why. The attorney is returning case files and documents to the client and enclosing a final bill. First and foremost, I want to extend our heartfelt thanks for choosing our law firm for your legal needs.