How to write a resignation letter that's effective immediately? Public officers may resign their offices as follows: a.The term "voluntary separation" as used in the statute means leaving employment of one's own free will. An emergency resignation letter is a polite letter given to a business or organization that states that an employee must terminate their employment abruptly. If you are resigning with immediate effect in protest at how you have been treated, a verbal resignation is enough, but it is better to put it in writing. A resignation letter should be written at least 30 days prior to the effective date of resignation. This sets the tone and leaves no room for ambiguity. I walked out and submitted a "immediate notice of resignation" an hour later. When an employee tenders a notice of resignation, they have resigned. In law, every employee has absolute right to resign at any time before termination of, or dismissal from an employment.