A resignation letter should be written at least 30 days prior to the effective date of resignation. I am writing to notify you of my resignation from POSITION at SCHOOL, effective DATE.RE: Notice of Resignation from Employment at Lee College. Dear ,. A formal resignation letter includes: A salutation. Your intention and departure date. USC human resources experts share their tips for how to write a resignation letter and how to deliver it. In the opening paragraph, clearly state that you are resigning from your position. Elevate your vocabulary Sign up to our newsletter to receive our latest news, exclusive content and offers. I write to tender my resignation as a Special Assistant District Attorney and to explain my reasons for resigning.