How to write a resignation letter that's effective immediately? My resignation is effective immediately.Browse from the list of 15 resignation acceptance letters sample to acknowledge and accept employee resignations effectively. Start with the facts and be direct. Moving up the date of the employee's resignation is permissible, but it can cause some problems. How to write resignation letter with immediate effect word format. These FAQs are not to be considered complete and do not relieve employers from complying with applicable IDOL laws and regulations. 1. Situation is likely to result in immediate bodily harm. When an employee resigns, the HR Partner must initiate the termination process promptly after the employee submits the resignation.