We've rounded up tips and examples for writing a resignation letter that'll help you maintain work relationships long after leaving a company. In this article, we discuss how to include a reason in your resignation letter and provide some samples to guide your writing.Find out how to write the perfect resignation letter, including examples and templates of a professional resignation letter. Facing workplace issues? Learn how to write an effective constructive dismissal resignation letter. Please accept this letter as a notice of my resignation. In the second paragraph, you can explain the reason you're resigning. You can keep it brief without too many details. If you plan to hand in a physical copy of your simple resignation letter, use this sample. Writing a resignation letter serves as an official document that notifies your employer that you are leaving the company and when your last day will be.