Include the last date of your employment in your email. Provide your employer with as much notice of your resignation as possible.I hope to stay in touch. Notice for CMS used to be 30 days for teachers. It may be less for staff. The body of your resignation letter should clearly state your intention to resign and the date of your future departure. Your letter of resignation should be short and professional. Ideally, you should send your resignation letter at least two weeks before your planned resignation date. Looking to resign from your job? Learn how to write a professional and respectful two weeks' notice email with our helpful templates and tips.