Be Clear: Be direct and get straight to the point. Clearly state that you are terminating the attorney and briefly state the reasons why.In the disengagement letter, the lawyer should warn the client of applicable time limitations, deadlines, and uncompleted investigation or casework. An end of representation letter serves as a professional and ethical marker to indicate the end of a specific attorney-client relationship. In this article, we'll explain when and how you should terminate your lawyer-client relationship. We'll even provide a sample termination letter. In accordance with Local Rule. Need to write an attorney closing letter to clients? This is to confirm that our engagement has terminated. The attorney is returning case files and documents to the client and enclosing a final bill.