A Unique Reference Number (URN) for cargo is a distinct identifier assigned to a shipment or consignment to ensure it can be uniquely identified, tracked, and managed throughout the logistics and transportation process. This number helps in coordinating various stages of the supply chain, from origin to destination, and facilitates accurate tracking, tracing, and documentation.

In the context of cargo, a URN might be used for:

• Tracking Shipments: Ensuring that the shipment can be monitored throughout its journey.
• Documentation: Associating the URN with all relevant shipping documents, such as bills of lading, air waybills, and customs declarations.
• Customer Service: Allowing customers and logistics providers to reference the specific shipment for inquiries or updates.
• Inventory Management: Integrating with warehouse management systems to track cargo within storage facilities.

A typical URN for cargo may include a combination of letters and numbers, often reflecting elements such as the shipment's origin, destination, date, and unique serial numbers. It ensures each shipment is distinct and traceable in both the shipping company's internal systems and across global supply chain networks.