To successfully prove discrimination in a wrongful termination case, you'll need to prove that the employer acted with unlawful motive. In most cases of wrongful termination in Arizona, you must file a claim within one year after the termination of your employment.Important: Your action will be dismissed if the summons and complaint have not been served within 90 days of the case filing. The Arizona Employment Protection Act is an exception to "employment-at-will. " This law prevents an employer from firing an employee for certain reason.