A resignation letter must state a teacher's intent to retire on a positive note with an offer to cooperate during the transition process. This purchase will be an instant download, and you will receive two versions of the retirement letters -- a concise yet heartfelt short letter and a comprehensive detailed letter, allowing you to choose the perfect tone for your retirement announcement.A black and white resignation letter template with the title 'LETTER OF RESIGNATION' at the bottom. How do you write a retirement resignation letter? Use one of our resignation letter templates. This manual is designed to assist hiring managers with appropriate hiring processes and Human Resources practices. In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan. In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan. Give your employer at least two weeks' notice. Employees with a long tenure at the company typically give a month's notice or more.