This article examines how to plan for termination in therapy and what questions and activities can help ensure you meet the client's needs. Figure out what to say in a client termination letter to ensure a professional exit and use our letter template to save time.A therapy termination letter is a formal, professionally written document that therapists use to end their therapeutic relationship with a client. Directly state your purpose for writing in the first paragraph of your letter. What should be included in a termination letter? Up to and including termination of this Contract. Some relationships are meant to last and others, well…it's important to know when it's time to say goodbye.