if you don't want to buy codes. Generating FNSKU labels for your FBA shipments.

After purchasing from GS1, wait 24–48 hours for the database to sync before attempting to list the product on Amazon, or you may receive an "invalid" error. 3. Understand Barcode Types UPC (12 digits): The standard for North America. EAN (13 digits): Primarily used in Europe.

This is an internal Amazon barcode used for FBA (Fulfillment by Amazon). You print this from Seller Central and place it over the manufacturer's UPC so Amazon can track your specific inventory.

If you have many items or variations (sizes/colors), you should license a Company Prefix . This allows you to generate dozens or hundreds of barcodes under your brand for an initial fee plus an annual renewal. 2. Match Your Data Exactly