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 our immediate resignation letter template to create a personalized letter that allows you to leave your job professionally. In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. Looking to resign with a 24 Hours Notice Resignation Letter? Use our resignation letter template for notice-period roles. Download a free immediate effect resignation letter template, easily customizable for your personal situation.