Amazon Ends FBA Commingling: New Barcode and Labeling Rules Take Effect July 31, 2026
Amazon is ending FBA commingling on July 31, 2026. Brand owners can keep using manufacturer barcodes, but all resellers must switch to FNSKU stickers or face inventory being flagged as defective.
Overview
Amazon is making a significant change to how FBA inventory is tracked and fulfilled. Starting July 31, 2026, commingling — the practice of mixing identical products from different sellers to speed up delivery — will officially end. This shift introduces new barcode labeling requirements that differ depending on whether you are a brand owner or a reseller, and every FBA seller needs to understand what action is required before the deadline.
Key Points / What Sellers Need to Know
- Commingling is ending — Amazon will no longer fulfill orders using another seller's identical inventory. Customers who purchase from you will only receive products sourced from your own stock, including for returns and removals.
- Brand owners keep using manufacturer barcodes — If you are enrolled in Brand Registry as the brand representative, you can continue shipping products with their existing manufacturer barcodes (UPC, ISBN, etc.) without applying additional stickers.
- Resellers must switch to FNSKU barcodes — All resellers, including authorized resellers of a brand, will be required to apply Amazon FNSKU barcode stickers (X00 labels) to every unit sent to fulfillment centers after July 31, 2026.
- Non-compliance has consequences — Inventory received from resellers without proper FNSKU labels after the deadline will be flagged as defective, and unlabeled units will not be eligible for reimbursement.
- Existing stickerless inventory is grandfathered — Products already in transit or stored at fulfillment centers before the deadline can continue selling under their original SKUs with no action required.
What Is Commingling and Why Is It Ending?
Commingling allowed Amazon to pull the nearest available unit of an identical product from any seller's inventory to fulfill an order, prioritizing delivery speed over inventory separation. Amazon has determined that most sellers now maintain sufficient inventory levels to keep products positioned close to customers, making commingling unnecessary for fast delivery. By ending the practice, Amazon ensures that every order is fulfilled exclusively from the purchasing seller's own stock. This change also means that returns and removals will always route back to the correct seller, reducing mix-ups and improving accountability across the fulfillment network.
Analysis & Recommendations
Why This Matters
Every FBA reseller must update their labeling process before July 31, 2026 or risk having inventory flagged as defective and losing reimbursement eligibility. Brand owners benefit from simpler inventory management as commingling ends.
Key Takeaways
- Commingling ends July 31, 2026 — customers will only receive products from the seller they purchased from
- Brand owners enrolled in Brand Registry can continue using manufacturer barcodes without stickers
- All resellers must apply FNSKU (X00) barcode stickers to every unit sent to fulfillment centers after the deadline
- Non-compliant inventory will be marked defective and will not be eligible for reimbursement
Recommended Actions
- →Resellers should begin transitioning to FNSKU barcode labeling immediately and update prep workflows before July 31, 2026
- →Brand owners should verify their Brand Registry enrollment and brand representative status to confirm eligibility for stickerless shipping
- →Review your current inventory for products without manufacturer barcodes — these require FNSKU stickers regardless of brand ownership
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