In this article, we discuss how to include a reason in your resignation letter and provide some samples to guide your writing. Please accept this letter as a notice of my resignation."A resignation letter should be short and to the point. Simply explain why you're leaving and the date of your departure. Use one of our resignation letter templates. And reported (for example, to the GA Peace Officer Standards and Training. Council) as a resignation in lieu of termination. 4. If the reason for separation is OTHER THAN "lack of work," give complete details about the separation in space provided.