How to write a resignation letter that's effective immediately? 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 a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. 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. I will go over a step-by-step resignation template letter you can use, how to structure it and provide examples of resignation letters. Every resigning employee shall be urged to indicate in the Resignation form the reason for leaving.