99.9% of our business is water damage mitigation/mold remediation in the state of FL. Within Water Mitigation, tarping is one of the services we offer. Because of the quality and great service we provide, we were approach by a roofing contractor to tarp a couple of projects they were hired to do from an insurance company. As an insurance contractor, our billing is all based on Xactimate. Here we are nearly 60 days after completion, waiting on payment. On an invoice we charged $1000, they now want to pay $100. am I able to lean a property?