How to Write an Immediate Letter of Resignation (4 steps). Pick the perfect wording and convey the message best suited for your situation.Use a one week notice letter template to inform your current employer that you plan to resign within seven days. 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. How to write a resignation letter that's effective immediately? Quit your job gracefully. Browse Canva's resignation letter templates for ideas on how to write one for free. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. Please accept this message as my formal notice of resignation.