A clean bill of leading is so-called because?

A clean bill of lading is a document issued by a carrier (e.g., a shipping line or trucking company) that acknowledges receipt of goods and confirms that they have been shipped in good condition. It is called a "clean" bill of lading because it indicates that the goods have been loaded and transported without any damage or irregularities, and there are no discrepancies between the goods described in the bill of lading and the actual goods being transported. In other words, it is a document that confirms the shipment of goods in an appropriate condition, without any damage, errors or discrepancies.