Please accept my resignation from my position as security guard at 3M, with my last day being February 8, 2025. Below is a sample union resignation letter.You should check your union's constitution and bylaws to see if it is specific to whom a resignation must be sent. Subject : Resignation Letter. The body of your letter can be one statement that explains you're leaving your job on a specified date. Please accept this letter as a notice of my resignation. My resignation is effective immediately. Forms on this website are PDFs with fillable fields. Forms should be downloaded to your computer before filling in the fields. The letter typically includes the employee's reason for resigning, the effective date of resignation, and thanks to their employer and colleagues.