You can, but at least in the USA your employer has the right to reject your request to rescind it. Resignation acceptance letter template.You can try to rescind, but they do not necessarily have to accept it. Sample Resignation Letters. Under the Texas Education Code, contract employees are required to resign no later than 45 days before the first day of instruction for the school year. It will probably be uncomfortable, but there are ways to decline a job offer you've already accepted that don't burn any bridges. A civil service system generally means employment in government with such positions filled on merit as a result of a competitive examination or screening. It's not common to withdraw your resignation, but it's entirely accepted. Sam Houston State University is committed to helping students complete their education. You need to give valid reason for resignation.