Learn how to write a resignational letter if you're quitting for personal reasons. Simply write that you're leaving for "personal reasons" after stating your intent to resign and your last day of employment with the company.Start with a proper greeting: Address your resignation letter to your immediate supervisor or manager. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. A letter of resignation does not need a reason. Be direct and concise. In your letter, state the specific date you plan to leave work. It is with sadness that I write to tell you that I am resigning from The New York Times. However, I've decided that it's time to pursue a new challenge, and am writing to resign from my position, effective October 30th.