In Arizona, unexpected termination does not even have to come with a reason. Wrongful termination refers to an unfair and illegal loss of employment.In Arizona, this can be difficult to prove since this is an employment at will state. In order to walk away with a successful wrongful termination investigation or lawsuit, you'll need to prove that the employer acted with an illegal motive. In Arizona, a state law wrongful termination lawsuit must be filed within one year of the termination date. Wrongful termination occurs when your employer's reason or motivation for firing you (or taking some other adverse action) is against the law. Learn if you've been fired illegally, whether you're protected under Arizona and federal labor laws, and what you can do about it. Wrongful termination occurs when your employer's reason or motivation for firing you (or taking some other adverse action) is against the law. (b) There is an Arizona state law that says an employer cannot fire an employee for that reason. There is no general cause of action for wrongful termination.