How to write a resignation letter that's effective immediately? Learn how to craft a professional resignation letter without notice with our guide.Can an employer terminate me without advance notice or without giving a reason or an unfair reason for the termination? Most companies don't require official written notice before resigning from a position. Create an Immediate Resignation Letter without a notice period using our free printable templates. Resign with a professionally designed document. Explore why a good resignation letter is important and how to write it, and check out our free resignation letter examples. My resignation is effective immediately. When an employee resigns, the HR Partner must initiate the termination process promptly after the employee submits the resignation. Your resignation letter provides the board with formal notice of your departure.