How to write a resignation letter that's effective immediately? In this article, we'll provide a detailed resignation letter example to help you leave your current position on good terms.Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. Use a concise sentence, such as "This letter is my formal notice that I'm resigning from my position. " State the amount of notice you're providing. Hi,. Please be advised that I am resigning my position with immediate effect. Regards,. This Easy Form does not deliver your resignation letter to your principal. Please accept this letter as my formal resignation. Today will be my last day of work. How to Write an Immediate Resignation Letter?