Want to know how to write a retirement letter of resignation? Get the insights you need and free retirement letter template to help guide the way.I am writing to formally announce my retirement from my position as Senior Marketing Manager with BluWave, effective April 30, 2050. In this article, we discuss how to write a retirement letter and we provide an example letter to help you draft your own. I would not give any reason for leaving. 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. Your retirement resignation letter should begin with a header that states the contact information of the sender and addressee as well as the date. In this post, we provide written 10 different retirement letter samples to use, so you're sure to find one that feels right for your situation.