How to write a resignation letter that's effective immediately? Employees are encouraged to provide their supervisor with a minimum of two weeks' notice of their intention to separate from City employment.Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. It's polite but not necessary for your resignation to go to your manager. It can go straight to HR. It has to be in writing, but email is in writing. A. An employee will notify his or her supervisor at least two weeks prior to the date he or she intends to separate from employment with the City. In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. May 29: Riverside Academy graduation. Nayib Hassan, who represents Enrique Tarrio, wrote in a Jan. Washington, D.C., received heavy snow as Presidentelect Donald Trump's victory was certified.