You want to give at least a two weeks' notice. 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.It is perfectly legal to ask an employee to sign a resignation letter at any time. They don't have to sign it. California's labor laws do require you to give at least 72 hours' notice if you want your final paycheck at the time you leave. California laws say that, in general, you are not required to give your employers two weeks notice – or any notice – prior to quitting or leaving a job. Bad for you more than employer. Once you give notice, a freedom comes over you.