How to write a resignation letter that's effective immediately? Example 1: This is to notify you that I would like to resign from my position as (your post) effective immediately from tomorrow.This resignation letter sample provides your employer with a letter for your file and also suggests that you've done everything you can to remain professional. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. Simple resignation letter and email message samples to use to quit a job, as well as tips for what to write and how to resign. Include the date of your last day of work. Give a clear reason for leaving, but there is no need to overexplain. Please, accept this letter as a formal notification of my immediate resignation from the assistant manager position. A polite, formal closing with "Sincerely" and your name and signature will be the final element of your tendering a resignation letter format.