How are SID numbers issued for logistics?

SID (Shipping Instruction Document) numbers are typically issued by logistics companies or freight forwarders as part of their shipment processing system. Each SID number is unique and is generated when a shipping instruction is created, helping to track and manage shipments throughout the logistics chain. The number is associated with specific shipment details, including consignee information, cargo type, and shipping routes, ensuring accurate documentation and efficient logistics management.