The question

I had a tenant sign a lease agreement where a water affidavit was provided, it sounds like the tenant had the water bill in the sons name before I purchased the home, when I took ownership of the property the lease agreement and water affidavit was provided to the Charter Township Office, however now that the tenants have been evicted they are stating that they have nothing on file when I am for certain documentation was provided. The water balance is going to be placed as a lien on the property if not paid. Is there anything I can do ?