In the opening paragraph, make it clear that you are retiring. Address the right people.Time frame: Clearly state your last planned day of employment. A retirement letter is an official notice stating an individual's resignation from their position and requesting any retirement benefits. Check out our retirement resignation letter selection for the very best in unique or custom, handmade pieces from our templates shops. Your retirement resignation letter should begin with a header that states the contact information of the sender and addressee as well as the date. Check out our sample retirement letters selection for the very best in unique or custom, handmade pieces from our templates shops. I want to assure you of my gratitude for a rewarding professional association during my tenure with ABC Company. After many years at XYZ Company, I'm glad to submit this resignation letter. I am formally resigning from my position as Senior Registered Nurse at Maplewood Medical Center.