What do you write in a teacher Retirement Letter? How do you write a retirement resignation letter?In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan. Documents, Forms, Policies and Resources. RTF Recruiting and Hiring. Talk to your supervisor about your plans to retire. Submits a written resignation. Briefly explain your decision to retire. You can emphasize that it's the best decision for you and that you plan to embark on a new chapter. The resignation will be submitted in the HCM System and routed to the appropriate department within the Human Resources Division for approval.