You want to give at least a two weeks' notice. By Brad Nakase, Attorney.It's customary to provide at least two weeks' notice so that your employer has time to adequately prepare for your departure. Got the answer I needed: Wait until background checks are cleared and the start date is formally set rather than tentative. Looking to resign from your job? Learn how to write a professional and respectful two weeks' notice email with our helpful templates and tips. Yesterday I gave my two weeks notice along with my letter of resignation. The letter stated that my last day would be September 11th. Many employees across the state of California wonder if the "two weeks' notice" rule applies to them. In your letter, state the specific date you plan to leave work.