How to write a resignation letter that's effective immediately? Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide.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. Use one of our resignation letter templates. I am writing to inform you that I will be resigning from my position as (Title) at (Company Name). Give a clear reason for leaving, but there is no need to overexplain. After receiving a resignation letter, the supervisor shall immediately notify the. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. Customer: I put in my resignation in at work, in Georgia, on the 29th of January.