How to write a resignation letter that's effective immediately? 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.Create an Immediate Resignation Letter without a notice period using our free printable templates. Resign with a professionally designed document. Resignation Letter No Notice. Customize any of these resignation letters in minutes using our free AI-powered resignation letter builder.. This letter informs your employee that you must depart right away without the standard two weeks' notice. My employer asked me to sign a resignation letter. Download a free immediate effect resignation letter template, easily customizable for your personal situation.