How to write a resignation letter that's effective immediately? "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 letter of resignation to quit your job on good terms. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. , effective March 15, 2024. Due to unforeseen circumstances, I must resign from my position effective immediately. Note your last working day. 5. Discrimination in the workplace including sexual harassment and protected classes. (For example, "I regret to inform you that I will be resigning from my position, effective immediately.