California's AtWill Employment Law Does Not Require 2 Weeks' Notice. California is an at-will employment state.A twoweek notice period is standard, but not required. You can give however many weeks worth of notice that you feel is appropriate. Assume you'll be let go as soon as you give notice. So don't do it next time. Learn how to craft a professional resignation letter without notice with our guide. It's time to quit the job, and you're not giving two weeks' notice. Here's how to politely write a resignation letter, effective immediately. Giving a two week notice isn't required; it is merely a professional courtesy.