Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. 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. Looking to resign with a One Month Notice Resignation Letter? Use our resignation letter template for notice-period roles. A two weeks' notice letter is a formal resignation letter stating your plan to resign two weeks from the day you submit it. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Up to 150 words is good enough. Keep it short and sweet. My main thoughts are now to work as hard as possible to wrap my assignments here, and turn over my responsibilities as you direct.