In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan. Talk to your supervisor about your plans to retire.How do you write a retirement resignation letter? If you're planning to quit your job here is the compilation of the best resignation letter samples to help you easily draft your resignation letter. Click on 'Job Change' and then 'Resignation'. Complete prompts and select Worker Resignation > Resignation > Retirement. Documents, Forms, Policies and Resources. RTF Recruiting and Hiring. A retirement letter is an official notice stating an individual's resignation from their position and requesting any retirement benefits. What's included in a retirement letter of resignation?