We are a material supplier. We were contracted to supply material to a job (contract is with a GC) . We filed 3 pre liens, one for the initial contract and two for change orders. We have all the CO's that were approved and the tracking to prove delivery. The General contractor has stated that he is only going to send 50% of the total invoice and the payment will be complete. Can we cash that check and still file a lien for the balance of the invoices?