Be direct and to the point and, in the first sentence, acknowledge the receipt of their letter of resignation and formally accept it. Learn how to write a professional resignation acceptance letter with our helpful guide.I am writing to acknowledge receipt of your resignation letter dated September 12, 2051. Learn how to write a short notice resignation letter with samples. Find a solution to the challenge of resigning on short notice. Resignation Acceptance Email templates: Discover how to write an effective resignation acceptance letter.