A professional resignation letter most importantly outlines the details of your employment and departure. Learn how to write a resignational letter if you're quitting for personal reasons.A short resignation letter is the way to go. Include your name, position, the date of resignation and the intended last day of work in the first paragraph. To make a graceful exit, you'll want a resignation letter that clearly states your intention to leave, but also offers a word of thanks. State that you wish to quit and include your final day of work. Express gratitude, provide your end date, and offer to help with the transition plan. You could also specify the date, especially if you're leaving on short notice, to avoid confusion. Your boss is not legally obligated to keep your resignation letter confidential. Simply write that you're leaving for "personal reasons" after stating your intent to resign and your last day of employment with the company.