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.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. Resignation without a notice period short tenure. • If the employee is resigning from Broward County Public Schools, attach this form to the Separation. 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. I regret to inform you that, after much thought, I have decided to resign. Please accept this letter as a formal notice of my resignation. 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.