I had work done on my building by a general contractor. He completed the work and as part of a final payment signed a lien waiver. Now a paint supplier that I have never heard of filed a lien on our building saying the subcontractor never paid them (even though we paid the subcontractor). Many questions but: 1. How can a supplier who I didn't do business with file a lien on my property? This is between the supplier and subcon 2. How can I get the lien removed? Thanks!