Use one of our resignation letter templates. In this article, we discuss how to include a reason in your resignation letter and provide some samples to guide your writing.The complete guide to writing your resignation letter including expert tips, free copyable samples, and templates. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. It is standard practice to give at least a two-week notice. If you have a leadership position or a. A two weeks' notice letter of resignation is a professional courtesy and at times a contractual obligation. Here's how to let your boss know you're leaving. A Resignation Letter is typically a formal document given to employers two weeks before an employee resigns from a role.