First of all, the information that an employee is being fired is not confidential: an employer may legally tell anyone it likes, including before the employee is told. It's unprofessional to do this, but legal.Second, if you do not have an employment contract, you are an employee at will, and may be fired at any time, for any reason--even an unfair or incorrect reason. So there is likely nothing you can do about the coming termination.However, if false factual information is being told to others about you--i.e. the employer is saying that you stole, when you did not--that may be defamation, and you may have a legal claim for the damage to your reputation. If you believe this is or  may be the case, you should speak with a personal injury attorney.