Resignation letters are professional courtesies that extend your professionalism, even in the last days of current employment. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own.Use one of our resignation letter templates. The complete guide to writing your resignation letter including expert tips, free copyable samples, and templates. This sample resignation letter is available for use on UpCounsel. Your resignation letter should be upbeat and positive. It should be written to your immediate supervisor, expressing warm feelings for the company, and regrets. 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.