In this article, we discuss how to write a retirement letter and we provide an example letter to help you draft your own. How do you write a 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. Use this resignation letter sample as a model to advise your employer that you are resigning because you are leaving the workforce. In the opening paragraph, make it clear that you are retiring. : Complete a Resignation Letter and indicate that you will be resigning. How does my selection of beneficaries affect my retirement benefits in the event I die before I retire?