Property management co stealing from me

[Mariah Jeffery]

I have a property with two garages on it. I found out one of the garages is rented because my father in law was there and saw the tenant coming out of it. He asked how long he has been there and what he is paying. He is paying $45 per month rent since April, and this has not shown up on our statement. My father in law walked into the property management company and asked about it. They looked him straight in the eye and said that no one is renting the garage. I'm in complete shock. Should I take legal action?