Can I fire an employee for making a false complaint about our companys billing practices to a government agency?
Under most “whistleblower” laws, it depends on the employee’s intent. As long as the employee has a good faith belief that something illegal is going on, you cannot fire the employee for complaining about it. If, however, the employee knows the complaint is false and makes it simply to stir up trouble, the employee probably is not a protected whistleblower.