Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Use a one week notice letter template to inform your current employer that you plan to resign within seven days.Pick the perfect wording and convey the message best suited for your situation. A resignation letter needs to include your contact information, official notice that you're resigning, and when your final day of work will be. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. Include the position title and the last day you intend to work.