How to write a resignation letter that's effective immediately? In the first sentence, clearly state your intention to resign and that your resignation is effective immediately.Download Pennsylvania Immediate Letter Of Resignation template, modify and send for signing using BoloForms Signature. It's time to quit the job, and you're not giving two weeks' notice. Here's how to politely write a resignation letter, effective immediately. Along with the Medical and Life Insurance Forms on the Benefits page, you may need the following forms. This letter informs your employee that you must depart right away without the standard two weeks' notice. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Prior to speaking, you must sign in on the sheet located on the table at the entrance to the meeting room.