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 someone gives a resignation letter without giving the required one month's notice, what can his employer do against him (like filing a complaint)? Yesterday I gave my two weeks notice along with my letter of resignation. The letter stated that my last day would be September 11th. When you're unhappy at work, it might be time to go. Here's how to write a resignation letter without burning bridges, including samples and formatting. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation.