Hello, I’m currently in contract with a contractor. A lot of payments have been made already and am requesting the contractor to provide a signed unconditional waiver and release form from each of the subcontractors and materials suppliers. Is there a deadline as to when they have to provide those? Can I stop payment until I receive those signed forms for work done by subcontractors and materials suppliers? Can contractor file a mechanic’s lien on the property if they don’t provide those forms that I need before writing the next installment check?