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. At will employment simply means that your employer can fire you at any time, for any reason, or for no reason at all.Discover your rights and your employer's duties under Texas Labor Law with this comprehensive guide. Your actions can serve as a resignation; i.e. , walking off the job or not showing up. The Dallas County Administrative Code contains the employment policies and procedures for Dallas County. Managers, supervisors, or employers can pressure employees to resign which can violate employment laws. Your actions can serve as a resignation; i.e. , walking off the job or not showing up. When Can an Employer Sue an Employee?