How to write a resignation letter that's effective immediately? In this article, we explain what a resignation letter is, why they're important, provide steps for writing it, and give you a template and examples.Simply explain why you're leaving and the date of your departure. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. You simply need to draft up the notice with the date you intend to end your employment. In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. Download a free immediate effect resignation letter template, easily customizable for your personal situation.