Upon receipt of the employee's Notice of Leave, the supervisor is required to approve or deny the request as soon as possible. 4. 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.Attach employee resignation letter to the eForm. 1. Prior to submitting a resignation online, an employee should inform their direct supervisor. In-Person: Employees may visit 141 Lavaca Street to submit their retirement or resignation from the district. An emergency resignation letter is a polite letter given to a business or organization that states that an employee must terminate their employment abruptly. Checklist for Resignation of Guardian (Texas Estates Code 1203.001). Application for resignation, state if immediate need. A basic resignation letter should include the fact that you're resigning and the last day you will work.