Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide. This sample resignation letter is available for use on UpCounsel.The formatting of a professional resignation letter should be brief and to the point. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. Learn how to write a professional resignation letter with our step-by-step guide and easy to use templates. A simple resignation letter format includes a resignation statement, an appropriate notice period, and an expression of gratitude. Am I retiring or resigning? Division of Human Resources. 600 Franklin Building 3451 Walnut Street. Your resignation email's subject line should say your name and that you're resigning.