In this article, we discuss what to include in a professional resignation letter and we share examples of resignation letters you can use for reference. Start with a two weeks notice letter.This will serve as a formal, written documentation of your intent to leave and your transition timeline. Learn how to write a resignation letter with a notice period. 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. Please accept this email as a notice of my resignation from my current position as Consultant in XXX. Although a verbal resignation is sufficient for many employers, a resignation letter is more formal.