Resignation acceptance letter template. Edit, sign, and share acceptance resignation employee online.No need to install software, just go to DocHub, and sign up instantly and for free. A UTSA employee who is terminating or retiring should submit a letter of resignation to their supervisor. 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. Please accept this letter as a notice of my resignation.