How to write a resignation letter that's effective immediately? Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template.This guide will provide you with helpful tips and advice on how to write a clear and concise resignation letter. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. I am writing to formally inform you of my decision to resign from my position at Wilson Co. as Sales Manager. We recommend a short letter and a written transition plan. See sample resignation letters below. Give a clear reason for leaving, but there is no need to overexplain. If you do not have enough wages from employment in the base period, TWC cannot pay you benefits.