How to write a resignation letter that's effective immediately? Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation.Commence your letter with a formal salutation and a concise introductory paragraph. 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. The information provided in the FAQs is intended to enhance public access and understanding. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. Nope. They can accept your resignation immediately and it's still a quit. Human Resources plays a central role in the termination process.