How to Use Two Weeks Notice Letter? Be open and honest, I spoke face to face with my supervisor first.Then handed in a official letter. You want to give at least a two weeks' notice. In this article, we explain how to write a twoweek notice letter and we provide templates, tips and examples to help you get started. It's customary to provide at least two weeks' notice so that your employer has time to adequately prepare for your departure. There are no laws I am aware of in the US that oblige you to provide a full two weeks notice. In the subject line of the email, include your name and the word "resignation. Although giving two weeks' notice is standard, it is not mandatory. Check your employee handbook – there's probably a policy in there that addresses giving notice to resign.