Directly state your purpose for writing in the first paragraph of your letter. Need to terminate a client contract?It's important to know when it's time to say goodbye. Firing a client can be awkward but necessary for your business. Learn how to fire clients (the nice way) with our sample scripts. How to fill out the Sample Letter of Termination from a Case? 1. Insert the client's name at the top of the letter. 2. Need to write a termination letter for you freelance business? Check out our 5 termination letter templates. We've provided 5 sample letters of termination.