Please accept this letter as a notice of my resignation. Access free resignation letter templates and tips.Write a professional resignation letter to ensure a smooth and respectful transition. Your resignation letter should be brief and to the point. You don't need to include lengthy explanations about why you are resigning. Simply write that you're leaving for "personal reasons" after stating your intent to resign and your last day of employment with the company. Due to unforeseen circumstances, I must resign. Resignation letters are professional courtesies that extend your professionalism, even in the last days of current employment.