The barcode you choose changes how inventory is tracked, commingled, and controlled — and Amazon now limits the manufacturer barcode to brand-authorized sellers. A plain-language guide to the trade-offs.
When you send inventory into FBA, Amazon asks how it should be tracked: with the manufacturer barcode (the UPC/EAN/GTIN printed on the product) or with an Amazon barcode (an FNSKU — an Amazon-specific label unique to your seller account). It sounds like a technicality. It changes how your inventory is handled — and Amazon has tightened who is allowed to choose each option.
Two identifiers, two purposes
An Amazon barcode (FNSKU) is seller- and listing-specific — it ties a physical unit to your account and listing. The manufacturer barcode identifies the product itself, not who is selling it. That difference is why Amazon offers both, and why the choice affects how your units move through the fulfillment network.
The two options
- Manufacturer barcode (commingled inventory) — Amazon may pool your units with identical units from other sellers. Cheaper and faster to prep (no relabeling), but you give up unit-level traceability.
- Amazon barcode / FNSKU (labeled) — every unit is labeled to your account. Amazon ships your physical units against your orders. More prep work, full traceability.
Who can use the manufacturer barcode now
This is where a recent Amazon change matters. Using the manufacturer barcode is no longer open to everyone: Amazon has tightened eligibility so that, in practice, it is available mainly to brand owners and brand-authorized sellers — typically those enrolled in Brand Registry with valid rights to the product's GTIN. Sellers without that brand authorization are generally directed to use the Amazon barcode (FNSKU) instead.
For a private label brand that owns its GTINs, this is less a restriction than a reason to be deliberate. Because Amazon's eligibility rules in this area continue to evolve, confirm the current requirements in Seller Central before planning a shipment around commingled inventory.
The advantages of the manufacturer barcode
For a brand owner that controls its own GTINs and supply, the manufacturer barcode unlocks operational flexibility the Amazon barcode (FNSKU) can't:
- Ship straight to FBA — from any authorized seller. Because the unit is identified by the product's own barcode rather than one seller account's FNSKU, any brand-authorized seller can send the same inventory into FBA without re-labeling or converting anything first.
- Diversify across exclusive, authorized sellers. A brand can authorize several exclusive sellers to carry the same catalog. If one authorized seller runs into a problem, the others can keep selling the same physical inventory — no single point of failure.
- Recover removed inventory without relabeling. If an account is suspended or a listing is removed and units are pulled from FBA, those units can be re-offered through another authorized seller and sold — without paying to relabel them.
- One label for every channel. Selling across multiple marketplaces no longer means a different label per channel. The same manufacturer-barcoded units can move between them.
- Lower prep cost and faster inbound. There's no per-unit FNSKU labeling step, so shipments are prepped faster and cheaper — a meaningful saving at volume.
- Simpler 3PL and prep-center logistics. Prep centers and third-party logistics partners can receive and forward manufacturer-barcoded units without account-specific labeling, reducing friction across a distribution network.
- Fewer labeling errors. Removing the manual relabel step removes a common source of mislabels and stranded inventory.
- Barcode applied at the source. The barcode is printed on the packaging during production, so there's no downstream labeling dependency — new products can flow into fulfillment faster.
- Potentially faster delivery. Because Amazon can fulfill a commingled order from the nearest identical unit in any fulfillment center, delivery speed and in-stock reliability can improve. This is a side effect of commingling rather than a guarantee — weigh it against the traceability trade-offs below.
A concrete example — Walmart WFS. With the manufacturer barcode, inventory produced for Amazon can be sent to Walmart Fulfillment Services (WFS) as-is, with no barcode change. If the units were produced with the Amazon barcode (FNSKU) instead, preparing them for WFS means re-applying a GTIN barcode — extra labor and extra cost.
Why it matters — and how the risk has changed
With the manufacturer barcode, units are identified by the product's own barcode rather than by your account, so you give up unit-level traceability — you don't control exactly which physical unit ships against a given order.
In the past this carried more exposure: when sellers without brand authorization could use the manufacturer barcode, quality or authenticity problems elsewhere in the pool could reach your customers. Amazon's recent update meaningfully limits that. Because the manufacturer barcode is now available mainly to brand-authorized sellers, the pool for a given product is largely confined to parties the brand has authorized — which reduces the risk that unauthorized or counterfeit units end up mixed in.
What remains is a traceability trade-off more than a counterfeit one. Keep Brand Registry protections active and monitor your listings so any unauthorized offers are caught early — and the manufacturer barcode becomes a much safer option than it used to be.
Which should you choose
There's no single right answer — it depends on your operating model:
- Amazon barcode (FNSKU / labeled) is the safer default for a single-account brand focused on protecting listing quality and traceability. Your customers receive your exact units, returns are cleaner, and you avoid commingling risk.
- Manufacturer barcode (commingled) rewards brand owners who own their GTINs and sell through multiple exclusive or authorized sellers and channels. Now that Amazon restricts it to brand-authorized sellers, the old counterfeit exposure is limited, so relabel-free flexibility and risk diversification increasingly outweigh the remaining traceability trade-off.
If you're a brand owner, the decision is strategic: how many authorized sellers and channels carry your product, and how much does relabel-free flexibility matter versus tight per-unit control? Choose deliberately — and confirm current eligibility in Seller Central before you build a shipment plan around it.
Curious how to set this up for your brand? Get in touch — and if you'd like a deeper, dedicated guide on this topic, let us know through the contact form and we'll write one.