Here are some tips for writing a professional resignation acceptance letter: Keep the letter short. Keep your letter brief and to the point.Ensure the most current form has been submitted. Leaving on short notice could jeopardize future employment if the former employer is listed as a reference and then contacted. I am writing to acknowledge receipt of your resignation letter dated September 12, 2051. Can't give two weeks' notice? Here's how to write a short-notice resignation letter with examples and a template included. Learn how to write a short notice resignation letter with samples. Find a solution to the challenge of resigning on short notice. I am writing to acknowledge receipt of your resignation letter dated September 12, 2051.