How to write a resignation letter that's effective immediately? Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template.Use a concise sentence, such as "This letter is my formal notice that I'm resigning from my position. " State the amount of notice you're providing. Include the position title and the last day you intend to work. In this article, we cover everything you need to know about writing a resignation letter without notice and provide an example to get you started. Trying to quit your day job? Learn how to write a resignation letter while maintaining positive work relationships.