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.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. 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 a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. I am writing to announce my resignation, effective in 24 hours. On 4 August 2016, Home Secretary Amber Rudd announced that Goddard had resigned from the Inquiry with immediate effect. Felt obliged to give his party a post-dated resignation letter. Events from the year 2019 in the United Kingdom.