In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. In this article, we discuss what to include in a professional resignation letter and we share examples of resignation letters you can use for reference.Resignation letters are professional courtesies that extend your professionalism, even in the last days of current employment. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. The Chief Deputy resigned Friday, writing a scathing public letter about his reasons why.