However, your employer doesn't have to accept your reversal and can go through with your resignation, meaning you will be out of a job. Turning down a job offer after you already accepted it should be done gracefully.Resignation acceptance letter template. The HR Partner must upload the employee's resignation letter to the human resources system when initiating the termination process. 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. You can try to rescind, but they do not necessarily have to accept it. You can try to rescind, but they do not necessarily have to accept it. You need to give valid reason for resignation. You can discuss about how important is your role in the company.