Here are some tips for writing a professional resignation acceptance letter: Keep the letter short. Keep your letter brief and to the point.Use one of our resignation letter templates. State your position on the day of resignation: Always mention the position you held in the office on your last working day. Can't give two weeks' notice? Here's how to write a short-notice resignation letter with examples and a template included. This manual is designed to assist hiring managers with appropriate hiring processes and Human Resources practices. I am writing to acknowledge receipt of your resignation letter dated September 12, 2051.