How to write a resignation letter that's effective immediately? Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips."A resignation letter should be short and to the point. Simply explain why you're leaving and the date of your departure. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. We've rounded up tips and examples for writing a resignation letter that'll help you maintain work relationships long after leaving a company. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. After the meeting, provide the formal written notice to the manager via email or letter. Here is a sample template to craft a resignation email:. I am writing to notify you of my resignation from my position as (job title) at (company name).