To write a good and simple resignation letter, greet your manager formally, then state your intent to resign and the date you'll officially depart. In this article, we explain what a resignation letter is, why they're important, provide steps for writing it, and give you a template and examples.Notice of separation. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. We've prepared several resignation letter samples and templates for crafting a concise yet professional resignation letter. Dear (Manager's Name), I'm writing to you today to submit my notice and resignation letter.