A formal written notice announcing intention to leave a job. Explore why a good resignation letter is important and how to write it, and check out our free resignation letter examples.Not all resignation letters are created equally. Here are templates to help you pen the resignation letter that explains your scenario. 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. In your resignation letter, it is essential to clearly state the date of your last working day, giving your company ample time to make necessary arrangements. Greet your direct supervisor formally. The next step in a retirement resignation letter template is to add the date.