Learn how to write a resignation letter with a notice period. 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.A two (2) weeks notice resignation letter is the most common letter used when notifying an employer of an official resignation. Please accept this as my formal letter of 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. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. 2 weeks notice period. Just write something nice and when you want to quit and how much you have gained. A simple resignation letter format includes a resignation statement, an appropriate notice period, and an expression of gratitude.