How to write a resignation letter that's effective immediately? Create an Immediate Resignation Letter without a notice period using our free printable templates.Resign with a professionally designed document. 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. 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. Resignation is effective as of the date indicated on your S-54 form. Resignations are processed as final and do not continue to pay out over the 12-month cycle.