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. Your resignation letter should be clear and concise.Include the position title and the last day you intend to work. It should be brief, wellwritten and clearly states your intention to resign and last day of work. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. Don't rant or vent, it won't go anywhere. Please accept this letter as my formal resignation. Today will be my last day of work. A resignation letter is a formal written notice stating your intention to leave your job. How Should You Give Notice of Resignation?