Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Q: How should a letter of resignation be formatted?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. In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. Q: How should a letter of resignation be formatted? Include the date of your last day of work. If not then write a second letter that address that as a result of a refusal to resign you will now have to proceed with Court action. Include the effective date of your resignation and the date of your departure. A simple resignation letter format includes a resignation statement, an appropriate notice period, and an expression of gratitude. With deep regret, I am writing to inform you that I am resigning from my position as sales manager for personal reasons.