I rented a commercial property, the tenant will have 24 months of a lease, but now wants out of four months. Under the agreement can not sublet or assign someone's property without permission. Well, he found "people" and someone new is already in use. I told him I want to make this transition as smooth as possible and I told him that I will be charging a fee of $ 500 oil spill investigation. Commercial rental property of $ 2,500, and 20 months remaining. You can charge the $ 500 or more?