When creating your resignation letter keep it short and polite. A letter of resignation does not need a reason.It only should announce that you are retiring from the organization effective some specific date. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. Write a letter of resignation. It's up to you how detailed you want to make it. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Keep it brief but focused. Clearly state your desire to resign.