Both possibilities involve leaving your job; however, there are some benefits you're entitled to get when you retire instead of resigning. A resignation letter will work, but should I send a retire notice?Depends on your company's policies. A resignation implies future activity. Friends, colleagues, and students will want to know what is next for me. Please make all necessary paperwork and forms ready for my exit on ( this date ). Thank you for your time. NYSLRS retirees can work after retirement and still receive a pension. However, you should be aware of the laws governing post-retirement employment. The resignation letter is a legal document that makes a legal representation of your decision to leave your employment.