In this article, we discuss how to write a retirement letter and we provide an example letter to help you draft your own. Include the position title and the last day you intend to work.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,. , Attorney Registration No. , a duly admitted attorney at law in the State of Ohio, wish to retire or resign from the practice of law in. Ohio. In the opening paragraph, make it clear that you are retiring. I will document and share the status of my projects and, if desired, assist in the search for a replacement. Best,. Use business letter format. Because this is a professional letter, you should use business letter format for your letter. Voluntarily retire my Ohio certificate as a Certified Public Accountant as of . I understand that I am giving up my right to practice public accounting.