Leaving a job isn't easy. A common misconception is that two weeks' notice is a legal requirement.There is no federal or Arizona law that makes this a requirement. A short resignation letter is the way to go. Include your name, position, the date of resignation and the intended last day of work in the first paragraph. A Phoenix police officer resigned his position over radio traffic after dispatchers told him the entire shift needed to stay on the clock to answer more calls. How to write a resignation letter that's effective immediately? Click on the image to download our immediate resignation letter example. Since they wish to leave immediately, they don't intend to serve the notice period stipulated in the contract, if applicable. ABC15 obtained a copy of Phoenix police officer Mark Rine's resignation letter, dated Nov.