Our customer is stating that our mechanic’s lien is void and invalid as a matter of law. They are stating that the fact that the individual executing the mechanic’s lien (zlien agent) had no personal knowledge of the lien claim (and was not acting as attorney for us, as required by Indiana statute) and the fact that we are not registered to do business in the State of Indiana and thus have no authority to ever file a lien foreclosure lawsuit to pursue any rights on the lien. Now they are demanding immediate release of the mechanic’s lien in full. Is my lien still valid?