How To Write A Partnership Termination Letter . First, due to the termination of your employment, if you return to the workplace, your presence will be considered trespassing. Here's a template for this type of notice: Partnership Termination Letter Format How to write a Partnership from www.pinterest.com Begin the letter by informing that you have decided to reject/terminate the business relationship with them. How to write this letter: Offensive or harsh words cannot be used in the letter.