Chat Hello. I am in Louisville KY and we are residential plumbing & HVAC service. We went to a home owners and installed an HVAC system. While we were there installing the system, we damaged the customers floor. We hired a person to come repair the floor and we were invoiced by that person. We TRIED to pay him, but he refused the payment because we withheld 24% backup withholding since he refused to provide his W-9. Now he is harassing and threatening the homeowner with a mechanics lien. Can he file one against the homeowner?