You cannot be fired for making a complaint to HR about harassment, discrimination, health and safety violations, failure to pay overtime, or other legally protected matters. That is true even if your claim turned out to be unfounded — as long as you made it in good faith. Keep in mind that not every complaint is protected for retaliation purposes. Making a so-called frivolous complaint is not a protected activity. Our attorney can explain your legal rights in regards to the specific complaint you made to human resources.