How to Use Two Weeks Notice 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. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Learn how to write a professional two weeks notice letter with our easytouse template. Today I put in my two weeks notice at a small company whom I've appreciated being with. In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience.