Use a one week notice letter template to inform your current employer that you plan to resign within seven days. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation.How to Write an Immediate Letter of Resignation (4 steps). Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. The employee is resigning from their position effective on a specified date, providing one month's notice to allow time to find a replacement. Please accept this message as my formal notice of resignation. I am fortunate to have received a long awaited opportunity that I cannot pass up. A good resignation letter is a simple one. There is no real need to elaborate farther than you have to.