To write a short notice resignation letter, include your position and effective date, explain your reason and express gratitude. 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 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. Customer: My employer bullied me into a resignation letter. He out of the blue accused me of "stealing" with no proof at all.