How to write a resignation letter that's effective immediately? Your resignation letter should be brief and to the point.You don't need to include lengthy explanations about why you are resigning. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. In this article, we discuss what a retail resignation letter is, the key parts you should include in the letter and the steps to writing one. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. Please accept this letter as notice of my resignation from my position as staff accountant. Please accept this letter as my formal resignation. Today will be my last day of work.