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.No state or federal law requires you to notify your boss two weeks before leaving your job. If you're an at-will employee, you can leave at any time. Learn how to write a professional resignation letter that gets noticed. They can legally fire you without notice, and without reason. Although two weeks' notice before leaving a job is standard, it is not mandatory. If the employee is discharged, they must receive their final wages within 3 days (Nevada Revised Statutes 680.020-NRS 608.040).