Serial Number

A Serial Number is a unique code used in foreign trade to identify individual products, typically composed of letters and numbers, ensuring uniqueness and traceability. Unlike a Batch Number, which applies to a group of products produced together, a Serial Number is assigned to each individual item. It is used for electronics, machinery, valuables, and other items requiring quality tracing, warranty management, anti-counterfeiting verification, inventory counting, and after-sales service. Precautions: When exporting, if products have serial numbers, they must be accurately listed on invoices and packing lists for customs inspection; discrepancies between serial numbers and contracts may cause customs delays or returns. Serial numbers should be unique and comply with importing country regulations (e.g., EU CE certification requires traceability). Difference from SKU: SKU is an internal management code that can correspond to multiple serial numbers, while a serial number is specific to a single item. Difference from Model: Model represents product specifications, while serial number represents a specific individual unit.