To write a short notice resignation letter, include your position and effective date, explain your reason and express gratitude. Learn how to write a short notice resignation letter with samples.Find a solution to the challenge of resigning on short notice. Please accept this letter as notice of my resignation with effect from today. In accordance with my notice period, my final day will be …………………… Can't give two weeks' notice? Here's how to write a short-notice resignation letter with examples and a template included. A simple resignation letter can be as short as two sentences. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward.