In this article, we discuss how to write a retirement letter and we provide an example letter to help you draft your own. We'll cover how to write a retirement letter, including a stepbystep guide, a sample letter and frequently asked questions.Retirement resignation letter. Your retirement resignation letter should begin with a header that states the contact information of the sender and addressee as well as the date. I am writing to inform you that I will be resigning from my position as (Title) at (Company Name).