How to write a resignation letter that's effective immediately? Start with a two weeks notice letter.This will serve as a formal, written documentation of your intent to leave and your transition timeline. Despite my best efforts to address this concern, the necessary changes have not been implemented. I apologize for any inconvenience this may cause. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. Bereavement leave shall be granted in the event of a death in the immediate family. 11.04.02. Immediate family includes only the following:. How do you format an Acknowledgement for a resignation letter? The series kicks off on Jan.