Start with a clear and concise statement that you are terminating the contract. Mention the contract's title and reference number (if applicable).The following sample termination letters can be customized according to your needs. Download this free Contract Termination Letter. Use this letter to give notice to terminate an independent contracting relationship. You need to be sure to terminate the contract in the correct way using the correct form in order to protect your client. How do you write a letter to terminate a client? Pursuant to our fee agreement, we will be sending you our final bill for legal services. Directly state your purpose for writing in the first paragraph of your letter. In this article, we'll explain when and how you should terminate your lawyer-client relationship.