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 one of our resignation letter templates. Looking to resign with a 24 Hours Notice Resignation Letter? Use our resignation letter template for notice-period roles. This job aid describes the process for submitting your resignation letter. Free Effective Immediately Resignation Letter Template. Create your immediate resignation letter online in minutes. Customize, download, and resign professionally with ease. Free Effective Immediately Resignation Letter Template.