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.. Use this resignation letter example to inform your employer that you need to resign immediately and will not be able to give two weeks' notice.