In the disengagement letter, the lawyer should warn the client of applicable time limitations, deadlines, and uncompleted investigation or casework. 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? Be Clear: Be direct and get straight to the point. Clearly state that you are terminating the attorney and briefly state the reasons why. A motion to withdraw is a document an attorney files with the court when that attorney no longer wishes to represent his client. You can write a letter to the attorney informing the attorney that you are terminating the attorney client relationship. We believe the court will grant our request for leave to withdraw from your case.