A new customer of ours had us fabricate material for their first big job. They would order and we would receive payment prior to delivery. I larger portion of the order (roughly $10,000 of fabricated material) was delivered on 5/12/2019 and their card was charged for roughly half that amount. Over the weekend they noticed that two of the parts were incorrect. Come Monday they held payment off because of the mistake, but our salesman visited the job and determined that the parts were ordered by our customer incorrectly and we provided what was ordered. He explained this to their company owner and their employee at which point the employee asked for us to fabricate the replacement parts PLUS one other large piece that they did not order. The owner called to confirm the delivery of the order, meaning he was aware it was ordered. We called to receive payment on the previously delivered material but were met with problems with their office manager as she said she did not approve the order. She is disputing the invoices and has refused payment. Will this be an issue when filing a lien? What are my options to assure that I get paid?