My employer fired me for an unfair reason, or for no reason at all. Filing a Wrongful Termination Lawsuit.Employees who have been wrongfully terminated while they are sick have the option to pursue financial recovery. The term "wrongful termination" means that an employer has fired or laid off an employee for illegal reasons in the eyes of the law. When Is Terminating a Sick Employee Wrongful? Wrongful termination happens when your employer fires you for an illegal reason. Learn what qualifies as wrongful discharge and the actions you can take. In a wrongful termination case, the evidence you can show to prove that you were wrongfully terminated is absolutely critical. You might be able to take legal action over your wrongful termination. Relationship as a potential ground for termination.