The standard here in Texas, an "at will" employment state, is to give two weeks notice. Professional resignation letter examples for different reasons.Free templates and writing guide to resign on a positive note without feeling awkward. A letter of resignation does not need a reason. In the letter, just say thank you for the opportunity to work here for x time. Please accept this letter as my resignation. If you want to keep it professional you should avoid the detailed laundry list. Customer: I have an employee who put in a two weeks notice(Texas). We accepted the resignation and made it effective immediately due to many factors. Understanding and articulating your reasons for leaving isn't about being critical toward the employer.