1) I am a home owner in California. When I pay my contractor, does the Conditional Waiver and Release signed by him, cover me against liens from his suppliers, or do I need to ask him to provide me with Conditional Waivers from each of his subs or suppliers as well? 2) In the latter case, above, does my canceled check to the contractor cover me even if my contractor fails to pay the supplier he got the Conditional Waiver from, or must I insist on joint checks or payment directly to the supplier? 3) Can contractors licensed in California legally refuse to provide these if requested by the owner? Thanks Andy