Commingled inventory, also called stickerless or virtual-tracking inventory, is FBA stock tracked by the manufacturer barcode rather than a unique Amazon (FNSKU) label. Amazon treats all sellers' identical units of an ASIN as one interchangeable pool, so when you make a sale, Amazon may ship a physically identical unit that another seller sent in. It saves you labeling each unit, but you lose control over which physical unit ships.
Is commingled inventory safe?
It carries real risk. Because units are pooled, you can end up shipping another seller's item, and if that item is counterfeit, damaged, or expired, the negative review, A-to-z claim, or authenticity complaint can attach to your account even though you did nothing wrong. For that reason most brand owners and private-label sellers avoid commingling and use FNSKU-labeled inventory to keep their units their own.
Andrew Erickson is the founder of Inventory Hero. He has spent years working with Amazon FBA sellers on demand forecasting, restock planning, and the cash flow side of running a private-label brand. Inventory Hero exists because every spreadsheet-based inventory system he tried eventually broke — usually right before Q4.
What is the difference between commingled and labeled FBA inventory?
Labeled (FNSKU) inventory has a unique Amazon barcode on every unit, so Amazon always ships one of your specific units and your stock is never mixed with anyone else's. Commingled (stickerless) inventory uses the manufacturer barcode and pools all sellers' identical units together. Labeled means more prep work but full control and traceability; commingled means less work but shared risk.
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Commingled inventory on Amazon, also called stickerless or virtual-tracking inventory, pools your units with every other seller's identical ASIN, tracked by the manufacturer barcode instead of a unique Amazon label. The short version: it saves you from labeling each unit, but it means Amazon can ship a unit another seller sent in, and if that unit is counterfeit or defective the complaint can land on you. That risk is why most brand and private-label sellers avoid it. One reassurance up front: if you sell under your own brand with a unique barcode (a GTIN in Brand Registry), commingling is typically not even available to you, so you are likely already protected; the barcode-setting section below shows how to confirm. Below is what commingling is, the risks, and how it compares to labeled inventory.
When you send inventory to FBA, Amazon offers two ways to track it:
Labeled (Amazon barcode / FNSKU). Every unit gets a unique Amazon label, so Amazon always ships one of your specific units.
Commingled (manufacturer barcode / stickerless). Units are identified only by the manufacturer's barcode (the UPC), so Amazon pools all sellers' identical units into one virtual bucket.
Under commingling, when you sell one, Amazon fulfills from the nearest unit in the pool, which may or may not be one you physically sent in. On paper the units are identical; in practice, they came from different suppliers with different quality control.
The appeal of commingling is real but narrow: you skip the per-unit FNSKU labeling step. For a high-volume seller of a generic, branded-by-manufacturer product, that labeling is a genuine cost in time or prep fees, and commingling removes it. Amazon can also sometimes ship from a closer unit in the pool, marginally helping delivery speed.
That is the entire benefit: saved labeling. Put a number on it: FNSKU labeling runs roughly 0.10 to 0.20 dollars a unit at a prep center, so a 500-unit inbound is about 50 to 100 dollars of labeling, a small and predictable cost. Weigh that against what commingling gives up: a single authentic-item complaint can lock a listing and take weeks to resolve. For most sellers the labeling is cheap insurance.
Counterfeit exposure. If another seller's pooled unit is counterfeit and a customer receives it on your order, the authenticity complaint can hit your account, even though your own stock was genuine.
Quality and condition. A damaged, expired, or defective pooled unit shipped on your sale produces a negative review or an A-to-z claim against you.
No traceability. You cannot prove which physical unit shipped, which makes defending a complaint much harder.
Brand damage. For a brand owner, a customer receiving an off-spec unit under your listing undercuts the brand you are building.
The through-line is loss of control: you are trusting every other seller's supply chain, and inheriting their worst unit's consequences.
For anyone building a brand, the calculus is straightforward:
You control what ships. FNSKU labeling guarantees Amazon ships your unit, from your supplier, with your quality control.
You are traceable. If there is a problem, it is genuinely your unit, and you can address the real cause.
You protect the brand. No customer receives an off-brand or counterfeit unit under your name.
The cost is the labeling work, which a prep center or your supplier can handle. For a private-label or brand-registered seller, that cost is small next to the account and brand risk commingling carries, which is why labeled inventory is the default recommendation. Brand Registry and gating also make commingling largely irrelevant for genuine brand owners, since their products are not interchangeable in the first place.
Whether your inventory is commingled comes down to how you barcode it, set per product:
Choose the barcode type when you create or convert a listing. "Amazon barcode" means labeled (FNSKU); "Manufacturer barcode" means commingled (stickerless). You can set a default in your FBA settings and override per SKU.
Check your current setting on a listing by opening it in Manage FBA Inventory and looking at the barcode/FNSKU field (or your account-level FBA barcode preference under settings). If a SKU shows a manufacturer barcode and no FNSKU, it is commingled.
Switching to labeled is the fix if you commingled and want out: convert the SKU to Amazon barcode and label future units, so your stock stops joining the shared pool. Units already sitting in the pool generally stay commingled until they sell through, so the conversion protects future inventory rather than retroactively un-pooling what is already there; if that existing stock worries you, a removal order is the way to pull it.
A key point for brand owners: commingling is often not even available to you. It requires a scannable manufacturer barcode that other sellers share, so a Brand Registry product with a unique GTIN, or any gated or private-label item, is not interchangeable in the pool and effectively must be labeled. In other words, the sellers most exposed to commingling risk are those selling generic, widely-listed products, exactly the case where the counterfeit risk is highest, so labeling is the safer default there too.
Commingled inventory pools your stock with other sellers' identical units to save you labeling, at the cost of control: you can ship someone else's unit, and its counterfeit or quality problems can become your account's problem. Labeled FNSKU inventory costs the prep work but keeps your units your own and traceable. For almost every brand and private-label seller, the control is worth the labeling, so choose labeled. For the broader operational picture, see FBA inventory reports and inventory accuracy; for the wider system, FBA restock planning.