How to write a resignation letter that's effective immediately? In this article, we cover everything you need to know about writing a resignation letter without notice and provide an example to get you started.Short, polite, to the point. "This note is to inform you that I have chosen to end my employment with XXXXX, effective immediately (today's date)." If you live in an at-will state, there is no requirement to give any notice for leaving or for your termination. You should be prepared to leave at any time. 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. This document provides an overview of the impact on your FCPS benefit programs upon termination of employment. Looking to resign with a Resignation Letter Without Notice?