Amazon Barcode Requirements for FBA: What's Changing in 2026
Amazon is changing FBA barcode requirements effective January 31, 2026. Brand owners can keep using manufacturer barcodes, but all other sellers must now apply Amazon FNSKU barcodes to their products.
Overview
Amazon is updating its barcode requirements for Fulfillment by Amazon (FBA) sellers, with significant changes taking effect on January 31, 2026. Every item shipped to an Amazon fulfillment center must carry a barcode for tracking purposes, and the rules around which type of barcode is acceptable are shifting. Sellers who rely on manufacturer barcodes need to understand whether they can continue doing so or must switch to Amazon's own FNSKU barcodes.
Key Points / What Sellers Need to Know
- Barcode requirement changing January 31, 2026 — Amazon is tightening its barcode policies, requiring more sellers to use Amazon-issued FNSKU barcodes rather than manufacturer barcodes (UPC, EAN, etc.).
- Brand owners retain manufacturer barcode privileges — Sellers who are registered brand owners can continue using manufacturer barcodes without applying sticker labels to their products.
- Non-brand owners must switch to FNSKU — Resellers and non-brand-owning sellers will now be required to use Amazon FNSKU barcodes on their products, even if those products already carry a manufacturer barcode.
- Unlabeled products will be flagged as defective — If a product that requires an FNSKU barcode arrives at a fulfillment center without one, Amazon will mark it as defective and apply a barcode sticker on the seller's behalf, reporting the issue as a shipment defect.
- Non-compliance carries serious consequences — Failure to meet barcode and preparation requirements can result in inventory refusal, disposal, return of inventory, blocking of future shipments, or additional fees.
How FBA Barcodes Work
Every product sent to an Amazon fulfillment center must have a scannable barcode so Amazon can track it through receiving, storage, picking, packing, and shipping. There are two main barcode types: manufacturer barcodes (such as UPC or EAN codes printed on retail packaging) and Amazon FNSKU barcodes, which are unique identifiers tied to a specific seller's inventory. FNSKU barcodes ensure that Amazon can distinguish your inventory from another seller's stock of the same product, which is particularly important for commingled inventory management. Sellers can generate and print FNSKU barcode labels directly from their Seller Central account and apply them to products before shipping to fulfillment centers.
Analysis & Recommendations
Why This Matters
Non-brand-owning FBA sellers must update their prep processes before January 2026 or face defect flags, shipment blocks, and extra fees. This impacts resellers, wholesale, and arbitrage sellers the most.
Key Takeaways
- Starting January 31, 2026, non-brand owners must use Amazon FNSKU barcodes even if products have manufacturer barcodes
- Brand Registry enrolled brand owners are exempt and can continue using manufacturer barcodes
- Products arriving without required FNSKU labels will be marked as defective in your shipment metrics
- Non-compliance can result in inventory refusal, disposal, blocked shipments, or additional fees
Recommended Actions
- →Check your barcode settings in Seller Central to determine which of your products currently use manufacturer barcodes and will need FNSKU labels
- →Invest in a thermal label printer and FNSKU label supplies if you are a reseller or non-brand owner with FBA inventory
- →Review Amazon's FBA barcode choice and labeling FAQ for specific transition details and update your prep workflow before the January 31, 2026 deadline
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