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). Because this serves as official notification of your leaving the company, clearly state the last day of work, your job title title and the company name. My resignation is effective immediately. Thank you for your help and guidance during my employment with ______. I wish you and the company much success in the future.