You must give appropriate notice (in most places it is 2 weeks, but in some companies it may be a month), and then you're done. While employees often give two weeks notice as a courtesy, there is no law requiring you to give any notice.You want to give at least a two weeks' notice. When you write a letter of resignation, you have quit. Offering to stay two weeks is the standard in an effort to help transition the work etc. In this article, we cover everything you need to know about writing a resignation letter without notice and provide an example to get you started. The law does not require the employer to "accept" the resignation for it to be effective.