GC with very basic time and materials contract with property owner of single family home in Illinois. Work was completed, including by subcontractors, and client paid by personal check. Later that day, client started complaining that several things requested to be completed hadn't been done. Following day client claimed minor damages (paint splatter, scratches, etc) and demanded partial refund. If check is ultimately returned by bank for stop payment request or non sufficient funds is filling a mechanics lien still an option or would it be an improper filling because they "paid" and I would have to instead pursue remedies related to bounced checks? Also, would your company costs and county costs for filling a lien be able to be added to the lien claim amount? Property is being listed for sale this week.