What barcode labels should I use for my product?
Here's a break down of FNSKU vs GS1 Barcode (UPC/EAN)
✅ FNSKU vs GS1 Barcode (UPC/EAN)
Type | Purpose | Used By |
|---|---|---|
FNSKU | Amazon’s unique identifier for your product, tying it to your seller account | Required if you use Amazon's fulfillment services (FBA) |
GS1 Barcode (UPC/EAN) | Universal product identifier, typically for retail products | Used in retail stores & optional for Amazon |
🎯 Which One Should Be on Your Product for FBA?
- If you're doing FBA (Fulfilled by Amazon) and chose “Amazon barcode” during the listing setup, then:
✅ FNSKU labels are required, and the GS1 barcode should be covered or removed.
- If you selected “Manufacturer barcode” during setup (using UPC/EAN), then:
✅ You can use your GS1 barcode, and no FNSKU is needed.
⚠️ How to Know Which You Chose:
To double-check:
- Go to Seller Central.
- Navigate to Inventory > Manage FBA Shipments.
- Open your shipment or product listing.
- Check the labeling option selected — "Amazon barcode" = FNSKU; "Manufacturer barcode" = GS1/UPC.
✅ Best Practice:
If you're unsure, use FNSKU labels — they ensure that inventory is linked directly to your seller account, especially if other sellers list the same product.
Let me know if you want help identifying if your current label is an FNSKU label — or feel free to send an image for confirmation!
Updated on: 31/10/2026
Thank you!