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.Use this resignation letter example to inform your employer that you need to resign immediately and will not be able to give two weeks' notice. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. This resignation letter sample provides your employer with a letter for your file and also suggests that you've done everything you can to remain professional. 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.