One of our clients is refusing to pay us. Thery decided to verbally "let us go" right before we completed phase 1 of a new subdivision. The prime brought in a new contractor right before informimg us. Now they are sending us the invoices from that contractor claimimg we are resposible for that contractors wort. I have already leined the property. My qwuestion is should I also send them a Stop Notice to freeze threir funds until we are paid?