Write a TwoWeek Notice Letter. In this article, we explain how to write a twoweek notice letter and we provide templates, tips and examples to help you get started.Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. The short answer is that an atwill employee is not required to provide two weeks' notice before quitting. It's customary to give at least two weeks' notice unless you have a different agreement with the employer. 6. Know how to write a two weeks notice letter? Check out our guide, complete with examples and learn everything you need to know. A common misconception is that two weeks' notice is a legal requirement. There is no federal or Arizona law that makes this a requirement.