Resignation letters are professional courtesies that extend your professionalism, even in the last days of current employment. 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. Use one of our resignation letter templates. In this article, we explain how to write a twoweek notice letter and we provide templates, tips and examples to help you get started. Here is a compilation of formal resignation letter templates to ease the pressure off you when writing your professional resignation letter. 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. This sample resignation letter is available for use on UpCounsel.