Download Michigan Retirement Letter template, modify and send for signing using BoloForms Signature. This article will address how to write a retirement letter of resignation and provide an example that you can use as a template for your own retirement letter.I am writing to inform you that I will be resigning from my position as (Title) at (Company Name). In the opening paragraph, make it clear that you are retiring. Your retirement resignation letter should begin with a header that states the contact information of the sender and addressee as well as the date.