You want to give at least a two weeks' notice. In this article, we cover everything you need to know about writing a resignation letter without notice and provide an example to get you started.Short, polite, to the point. "This note is to inform you that I have chosen to end my employment with XXXXX, effective immediately (today's date)." If you're wondering how to write a resignation email without a notice period, then our sample can help. A wellwritten letter explaining your circumstances is helpful when you're resigning without giving notice. Learn how to write a short notice resignation letter with samples. Find a solution to the challenge of resigning on short notice.