Use one of our resignation letter templates. Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide.The complete guide to writing your resignation letter including expert tips, free copyable samples, and templates. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. I regret to inform you that, after much thought, I have decided to resign. Please accept this letter as a formal notice of my resignation. A two weeks' notice letter of resignation is a professional courtesy and at times a contractual obligation. Here's how to let your boss know you're leaving.