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. This letter is to officially inform you that I resign from my position as xxxxxxx, effective immediately. Resignation Letter No Notice. Customize any of these resignation letters in minutes using our free AI-powered resignation letter builder.. Resignation. 1. Every resignation shall be in writing. If an effective date is specified, a resignation takes effect on the specified date. This letter informs your employee that you must depart right away without the standard two weeks' notice.