Give notice immediately and give them 3 weeks. If they want to ef around with your vacation, you can say that it's take it or leave it for you.Should I still give two weeks' notice if I know my company won't honor a notice period? Just write a quick note. Doing well, thank you. So I understand you have a hefty amount of accrued vacation time and you are wondering if the employer has to pay it out upon separation? Can you use vacation time for 2 weeks' notice? Managers may be able to deny PTO requests from employees who resign with a 2-week notice letter. How to write a 2 weeks notice letter? Mention your intent to resign and the position you're leaving.