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.Linked below are templates for resignations and retirements. Please be certain that your letter is signed, dated correctly and addressed to your administrator. You want to give at least a two weeks' notice. I'll show you exactly how to resign professionally and respectfully with the perfect resignation letter so you can leave on good terms. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips.