To write a short notice resignation letter, include your position and effective date, explain your reason and express gratitude. How to Write an Immediate Letter of Resignation?Be direct and to the point and, in the first sentence, acknowledge the receipt of their letter of resignation and formally accept it. A sample form to document an employee's verbal resignation. I accept your resignation and understand your last working day will be date. Learn how to write a short notice resignation letter with samples. Find a solution to the challenge of resigning on short notice.