How to write a resignation letter that's effective immediately? Dear Ms. Emily Clarke,.It's best to tell your boss that you're moving on to the next step in your career "facetoface or over video call," with at least two weeks' notice. In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. This resignation letter is only for an employee who is resigning from a particular position, not the company itself. Free to download and print. I understand and am aware of the procedure to announce my resignation, but cannot follow that procedure due to my obligations to another party. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template.