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.Resignation without a notice period short tenure. Your letter of resignation should be short and professional. A wellwritten letter explaining your circumstances is helpful when you're resigning without giving notice. This resignation letter sample provides your employer with a letter for your file and also suggests that you've done everything you can to remain professional. Create an Immediate Resignation Letter without a notice period using our free printable templates. Resign with a professionally designed document.