The End of an Era? Amazon's Big Shift Away From FBA Commingling and What It Means for Sellers
Published on: September 26, 2025 by AMZ Sellers Attorney®
If you've been on the Seller Central forums lately, you've probably seen the panicked whispers: "Commingling is dead!" While the policy isn't technically gone, the reality isn't far off. Amazon has made a decisive shift away from commingled inventory, fundamentally changing how sellers must manage their FBA products. This move, aimed at curbing counterfeit goods and protecting customers, has massive implications for every seller, from private label brands to wholesale resellers.
This article breaks down exactly what's changing, why Amazon is doing it, and the critical steps you need to take to protect your business.
What Was FBA Commingling, Anyway?
For years, FBA commingling was the "easy button" for inventory prep. The premise was simple: if multiple sellers offered the same product (identified by its UPC or EAN), Amazon would pool, or **commingle**, all that inventory together in its warehouses. When a customer ordered the product, Amazon would just grab the one that was geographically closest to ship quickly, regardless of which seller it originally came from.
- The Appeal (The "Pro"): It was simple. You didn't have to label each individual item with an Amazon-specific barcode (FNSKU). You just used the existing manufacturer's barcode (UPC). This saved time and money on prep.
- The Danger (The "Con"): This simplicity came at a terrifying cost. Your pristine, authentic products were mixed in with those from every other seller. If a bad actor sent in a batch of cheap counterfeits or damaged goods, your customer could receive their garbage, but your account would take the hit. This "commingling curse" has been a leading cause of authenticity complaints and suspensions for countless innocent sellers.
The New Policy: What Actually Changed?
Amazon's big move is to make **non-commingled, FNSKU-labeled inventory the new standard.**
The core change is this: For most new product listings, and increasingly for existing ones, Amazon now defaults to or **requires the use of an Amazon barcode (FNSKU)**. Using the manufacturer's barcode to commingle inventory is no longer the default option and is being phased out for many product categories.
An FNSKU (Fulfillment Network Stock Keeping Unit) is a barcode unique to you and your specific product listing. When you label your products with an FNSKU, they are tracked as *your* inventory exclusively. The item you send in is the exact item the customer receives when they buy from you. **Your inventory is never mixed with another seller's.**
Why is Amazon Forcing This Change?
Amazon's motivation can be boiled down to one word: **trust**. The rampant issue of counterfeit products was undermining the integrity of the marketplace. This policy shift is a direct and powerful strike against counterfeiters and low-quality sellers.
- Fighting Counterfeits: Commingling was the biggest loophole for counterfeiters. They could list on a popular ASIN, send in fake goods, and have them sent to legitimate customers, destroying a brand's reputation while hiding behind honest sellers. Requiring FNSKUs closes this loophole.
- Improving Customer Experience: Amazon wants every customer to receive an authentic, high-quality product every time. Separating seller inventory ensures accountability.
- Protecting Brands & Sellers: This change is a massive win for legitimate sellers. It gives you complete control over your brand and reputation, insulating your account from the actions of bad actors.
The Impact on You: The Good, The Bad, and The Necessary
This shift introduces new responsibilities, but the benefits far outweigh the costs.
✅ The Good: Total Control and Security
The biggest benefit is **complete inventory control**. You are now shielded from commingling-related suspensions. When a customer buys from you, they get *your* product. This protects your brand's reputation, reduces negative feedback, and drastically lowers the risk of unfair policy warnings.
❌ The Bad: More Prep Work
The downside is operational. **Every single unit you send to FBA must now be individually labeled with an FNSKU barcode.** This barcode must cover the original manufacturer's UPC. This adds a step to your prep process, increasing time and labor costs. However, you can manage this by using Amazon's FBA Label Service (for a fee) or outsourcing to a 3rd party prep center.
❗ The Necessary: Adapt Your Process
Compliance is not optional. You must adapt your inbound shipping process. When creating a shipment plan, you will select the "Amazon barcode" option and print the corresponding FNSKU labels from Seller Central. Failure to do so will result in rejected shipments, costly fees, and delays.
Don't Risk Your Business Over a Barcode
Amazon's move away from commingling is a clear signal: they are prioritizing brand protection and accountability. While it means more work for sellers, it's a positive step towards a more trustworthy marketplace. Adapting to this change is not just a good idea—it's essential for the survival and success of your Amazon business.
If you're struggling to navigate these changes or have already faced an account issue due to inventory problems, you don't have to handle it alone. The legal team at AMZ Sellers Attorney® specializes in helping Amazon sellers protect their accounts and resolve complex issues.
Get a Free Consultation TodayFrequently Asked Questions (FAQ)
What is the difference between an FNSKU and a UPC?
A UPC (Universal Product Code) is a manufacturer's barcode that is the same for every identical unit of a product, regardless of who sells it. An FNSKU (Fulfillment Network Stock Keeping Unit) is an Amazon-specific barcode that is unique to a seller. When you use an FNSKU, the inventory you send to Amazon is tied directly to your account, preventing it from being mixed with other sellers' stock.
Can I still use commingled inventory on Amazon?
While commingling (using the manufacturer's barcode) is not entirely eliminated, Amazon is heavily restricting it and making FNSKU-labeled inventory the default for most new product listings. For many categories and products, using an Amazon barcode is now mandatory. It is highly recommended to switch to FNSKU labeling to protect your account and brand.
How do I switch from commingled to stickered (FNSKU) inventory?
To switch, you must create a new SKU for the same ASIN. In your FBA settings, ensure your 'FBA Product Barcode Preference' is set to 'Amazon barcode'. When you create your new offer with the new SKU, Amazon will generate an FNSKU for it. You will then need to label all units for this new SKU with the FNSKU barcode before sending them to a fulfillment center.
What happens if I send commingled inventory for a product that now requires an FNSKU?
If you send inventory using only a manufacturer barcode (UPC) for an ASIN that Amazon has designated as requiring an FNSKU, the shipment will likely be rejected, returned at your expense, or subject to unplanned prep service fees where Amazon labels the units for you. This can cause significant delays and added costs.
Does Amazon's FBA Label Service cost money?
Yes, there is a per-item fee for the FBA Label Service. Amazon charges to apply FNSKU barcodes to your products at the fulfillment center. While convenient, this cost can add up, and many sellers find it more cost-effective to label products themselves or use a third-party prep center.
Why was commingling bad for many Amazon sellers?
Commingling was risky because your high-quality, authentic products were stored in the same bin as identical products from every other seller. If another seller sent in counterfeit, damaged, or expired goods, your customer could receive one of them. Your account would then be blamed, leading to negative reviews, returns, and even account suspension for authenticity complaints you didn't cause.
How does this policy change affect wholesale or arbitrage sellers?
This change has a significant impact on wholesale and arbitrage sellers. Previously, many relied on the ease of commingling. Now, they must incorporate a labeling step into their process for almost every product. While it adds a layer of work, it also protects them from being suspended due to a competitor's bad inventory on the same listing, making it a crucial step for long-term business health.
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