An unpaid seller is a seller who has not received full or partial payment for goods sold. As an unpaid seller, they have certain rights depending on whether property in the goods has passed to the buyer. These rights include lien, stoppage in transit, resale, and withholding delivery. The right of lien allows the seller to keep possession of goods until payment. Stoppage in transit applies when goods are in transit and the buyer becomes insolvent. An unpaid seller also has the right to resell goods in certain circumstances after providing notice to the buyer. If property has not passed, the seller can withhold delivery of goods until payment or conditions are fulfilled.