25-09-2026 · PDF Cropper
New Amazon sellers often mix up FNSKU, UPC and EAN barcodes. They look similar, but they do different jobs.
UPC (USA) and EAN (India and most other countries) identify a product anywhere in retail. The numbers come from GS1 - in India, GS1 India - and Amazon often asks for one when you create a new listing.
The FNSKU identifies a product and the seller who owns that unit inside Amazon's fulfilment centres. That way your units are never mixed up with another seller's stock of the same product.
Print FNSKU labels and cover the product's UPC or EAN so only one barcode can be scanned.
You still need FNSKU labels for FBA.
Use an EAN barcode on the packaging for retail billing.
EAN and UPC identify the product; the FNSKU identifies your unit at Amazon. Make FNSKU labels with the FNSKU label generator, and retail EAN labels with the Barcode Generator.
Last Updated: 23-09-2026