If you’re new to Amazon FBA, this term might sound a little confusing. <\/p>\n\n\n\n
Commingled inventory, also called stickerless inventory, is when Amazon takes identical products from different sellers and stores them together in the same bin inside its fulfillment centers. Instead of keeping your inventory separate from another seller’s identical product, Amazon mixes them together in one shared storage location.<\/p>\n\n\n\n
Commingling is the practice where Amazon fulfils customer orders using exact product matches from the closest available inventory in its network, even if that specific unit was originally sent in by a different seller. This is how identical products are pooled together, allowing Amazon to move goods faster and more efficiently.<\/p>\n\n\n\n
Here’s a simple example:<\/strong><\/p>\n\n\n\n Say you’re selling a popular LEGO set and you send 100 units to an Amazon warehouse in California. Another seller sends 50 units of that same LEGO set, same UPC barcode, to a warehouse in New York. A customer in New York places an order. Under the old commingling system, Amazon would ship from the New York warehouse, even though that unit came from the other seller’s inventory, not yours. Amazon tracked ownership virtually, but the physical units were stored together.<\/p>\n\n\n\n In other words, the barcode on the box became more important than which seller sent it.<\/strong><\/p>\n\n\n\n This system worked because both products had the same manufacturer barcode (like a UPC or EAN) and were considered identical. No individual seller’s label was needed, hence the nickname “stickerless.”<\/p>\n\n\n\n Commingling, often called “Stickerless Commingled Inventory” allowed Amazon to treat identical products from different sellers as a shared source.<\/p>\n\n\n\n It sounds convenient and for a while, it was. But as we’ll see shortly, this system had some serious problems hiding under the surface.<\/p>\n\n\n\n Understanding how the system actually worked in practice helps you appreciate why the change matters. Here’s the step-by-step process of how commingled FBA inventory operated:<\/p>\n\n\n\n Amazon created this system to achieve faster delivery speeds by fulfilling customer orders using exact product matches from the closest available inventory in the Amazon fulfillment network, even if that inventory belonged to a different seller. <\/a><\/p>\n\n\n\n In this illustration, identical products from multiple sellers are stored together in a shared warehouse bin using the same manufacturer barcode. For example, Seller A, Seller B, and Seller C all send the same product to Amazon using the same UPC code. Instead of storing each seller\u2019s inventory separately, Amazon places all units into one shared bin.<\/p>\n\n\n\n When a customer places an order, Amazon ships the nearest available product from the mixed inventory, even if that specific unit was originally supplied by a different seller. This system, known as commingled inventory or stickerless inventory, was designed to speed up fulfillment but also created risks such as counterfeit products and loss of inventory control.<\/p>\n\n\n\n Before we talk about why it’s ending, let’s be fair, commingled inventory had real advantages, especially for high-volume resellers and arbitrage sellers. Here’s why so many people relied on it:<\/p>\n\n\n\n These benefits were real and that’s exactly why this change is going to feel like a big adjustment for many sellers. But the downsides of commingling? They were just as real, and far more damaging.<\/p>\n\n\n\n While commingling saved money and time upfront, it carried major hidden risks and for many brand owners, it became a nightmare.<\/p>\n\n\n\n The counterfeiting issue caused major brands to withdraw from the platform. In 2013, Johnson & Johnson withdrew many of its consumer products, citing product quality concerns, including expired and damaged products.<\/p>\n\n\n\n What costly workaround did many sellers use? Printing additional seller-specific Amazon barcodes, FNSKUs, on every product to opt out of commingling. But it costs money. It’s estimated that brand owners spent $600 million in the past year alone on re-stickering solely to opt out of pooling.<\/p>\n\n\n\n That’s $600 million in unnecessary costs just to protect against a system Amazon itself created. Something had to change.<\/p>\n\n\n\n So why is Amazon pulling the plug now, in 2026? There are three solid reasons.<\/p>\n\n\n\n Now that most sellers maintain inventory levels that keep products close to customers, Amazon can achieve fast delivery without commingling. <\/a>The original reason commingling existed, to ship faster by using the nearest identical unit, simply isn’t as necessary anymore. Amazon’s fulfillment network is now sophisticated enough to move your specific inventory fast.<\/p>\n\n\n\n Rising counterfeit complaints from both sellers and customers made the system unsustainable. Ending the Amazon Commingling Program eliminates the practice of pooling identical items from multiple sellers under a single barcode, a system that had exposed brands to counterfeit and damaged products. <\/a>Amazon needed to clean up the marketplace.<\/p>\n\n\n\n Advanced tracking systems can now trace individual units without mixing inventory. <\/a>Amazon has invested heavily in technology that makes it possible to track your specific inventory through the fulfillment network without physically pooling it with other sellers’ stock. The technical barrier to ending commingling no longer exists.<\/p>\n\n\n\n The bottom line: Amazon doesn’t need commingling anymore, and the risks it created far outweighed the benefits it once provided.<\/p>\n\n\n\n The following requirements will go into effect for inventory shipped on or after March 31, 2026: <\/a><\/p>\n\n\n\n For Brand Owners (Enrolled in Brand Registry with Brand Representative Role): <\/strong>Brand owners with the Brand Representative selling role in Amazon Brand Registry will no longer need to apply Amazon barcode stickers to prevent commingling for products that already have manufacturer barcodes (such as UPC, ISBN). This means more flexibility in how you manage inventory because you will not need to pre-allocate units to Amazon or other channels. <\/a><\/p>\n\n\n\n For Resellers (Not Enrolled as Brand Representatives): <\/strong>Resellers not enrolled in Amazon Brand Registry as a Brand Representative selling role will now be required to use Amazon barcode stickers (FNSKU) for products, even if they have a manufacturer barcode.<\/p>\n\n\n\n This diagram shows how Amazon handled inventory before and after FNSKU labeling.<\/strong><\/p>\n\n\n\n This system improves inventory tracking, brand protection, and counterfeit prevention within Amazon\u2019s fulfillment network.<\/p>\n\n\n\n For All Sellers \u2014 Products Without Manufacturer Barcodes: <\/strong>For products that do not have a manufacturer barcode, both brand owners and resellers will need to use Amazon barcode stickers. <\/a><\/p>\n\n\n\n Amazon’s FBA Prep and Labeling Service Ended: <\/strong>Amazon’s FBA prep and labeling service ended on January 1, 2026. This means sellers must now handle all their own prep and labeling, including applying barcodes to products.<\/p>\n\n\n\n This is a double impact for resellers; not only must you now apply FNSKU labels to everything, but Amazon will no longer do it for you. You need a labeling process in place \u2014 whether in-house or through a prep center.<\/p>\n\n\n\n This update hits different seller types in very different ways. Here’s your breakdown:<\/p>\n\n\n\n Step 1: Identify Your Seller Type:<\/strong> Log into Seller Central and determine whether you hold the “Brand Representative” role in Amazon Brand Registry, or whether you’re a reseller. This one distinction determines everything else in your preparation.<\/p>\n\n\n\n Step 2: Update Your Barcode Preference in Seller Central:<\/strong> Sellers can set a barcode preference in Seller Central, choosing either manufacturer barcodes or Amazon barcodes for new offers. The preference only applies to offers created after the change, and existing shipments or offers cannot be updated retroactively.<\/p>\n\n\n\n To update: Go to Seller Central \u2192 Settings \u2192 Fulfillment by Amazon \u2192 Barcode preferences.<\/p>\n\n\n\n Step 3: Generate and Print FNSKU Labels (For Resellers)<\/strong>: For every product you sell as a reseller, generate an FNSKU through Seller Central:<\/p>\n\n\n\n Step 4: Audit Your Existing Inventory:<\/strong> Review all current inventory and upcoming shipments. Any inventory arriving at an Amazon fulfillment center on or after March 31 must comply with the new rules. Plan your shipment timeline accordingly.<\/p>\n\n\n\n Step 5: Set Up Your Labeling Workflow:<\/strong> Decide whether you’ll handle labeling in-house or partner with a third-party prep center. If you’re a high-volume seller, a prep center is often the most cost-effective and reliable option.<\/p>\n\n\n\n Step 6: Deplete Old Commingled Stock:<\/strong> Amazon is waiving low-inventory-level fees at the FNSKU level during the transition period. This allows you to deplete old stock and ramp up new labeled stock without financial penalties.<\/p>\n\n\n\n Step 7: Enroll in Brand Registry (If You’re a Brand Owner)<\/strong>: If you manufacture your own products and aren’t yet enrolled in Amazon Brand Registry, now is the time. Getting the Brand Representative role gives you the most flexibility under the new rules and saves you on labeling costs long-term.<\/p>\n\n\n\n The March 31, 2026 deadline applies to when shipments arrive at fulfillment centers, not when they’re created. If you create a shipment before March 31 but it arrives after, it must follow the new FNSKU requirements. <\/a>Don’t let this catch you off guard.<\/p>\n\n\n\n This is serious, and Amazon has been clear about the consequences.<\/p>\n\n\n\n After March 31, 2026, resellers without the proper FNSKU stickers will be marked by Amazon as “defective.” This will delay their sales and likely result in extra fees.<\/p>\n\n\n\n In plain terms, here’s what you’re risking if you ignore this deadline:<\/p>\n\n\n\n Almost certainly, Amazon rarely announces major policy changes without strict enforcement. Budget for compliance now. Don’t risk rejected shipments or account suspensions.<\/p>\n\n\n\n The cost of non-compliance \u2014 delays, fees, lost sales during peak periods \u2014 will far exceed whatever you might save by delaying your labeling setup.<\/p>\n\n\n\n If you’re just starting out on Amazon, here’s how to set yourself up for success in this new environment:<\/p>\n\n\n\n The end of commingled inventory isn’t just an isolated rule change. It’s a signal of where Amazon FBA is heading.<\/p>\n\n\n\n The future of Amazon FBA rewards sellers who take ownership of their inventory, their brand, and their product quality. The sellers who adapt fastest to these changes will be best positioned to grow.<\/p>\n\n\n\n Short answer: it depends on who you are, but for the long term, it’s good for the marketplace as a whole.<\/p>\n\n\n\n Short-term, yes, there’s an adjustment. Resellers need to set up new labeling workflows, budget for FNSKU costs, and potentially partner with a prep center. Arbitrage and wholesale sellers face higher per-unit costs. The deadline is tight, and sellers with inventory already in production before the announcement have a real challenge on their hands.<\/p>\n\n\n\n Long-term, this is a healthier, fairer, and safer marketplace for everyone. Brand owners get more control and lower costs. Customers get more consistent product quality. Counterfeits get harder to slip through. Sellers who do things right no longer get punished for the behavior of bad actors.<\/p>\n\n\n\n If you’re an Ecomclips reader \u2014 whether you’re a new seller just getting started, a reseller looking to scale, or a brand owner ready to take your Amazon business to the next level. The message is simple: don’t wait. Check your seller type, update your Seller Central settings, and get your labeling process in place before March 31, 2026.<\/p>\n\n\n\n The sellers who treat this deadline as an opportunity rather than a burden will come out ahead. And the Ecomclips team is here to help you every step of the way.<\/p>\n\n\n\n Amazon commingled inventory (also called stickerless inventory) is when Amazon stores identical products from different sellers together in the same bin and ships the nearest available unit when a customer places an order, regardless of which seller originally sent that unit.<\/p>\n\n\n\n Amazon is ending the commingling program to reduce counterfeit risks, restore trust in the marketplace, and give sellers greater control over their products. <\/a>Amazon’s improved logistics network can now achieve fast delivery without pooling inventory.<\/p>\n\n\n\n Amazon ends commingling on March 31, 2026. This is a firm deadline announced at the September 2025 Accelerate conference. The Amazon commingling program ending affects all US fulfillment centers.<\/p>\n\n\n\n It applies to arrival<\/strong>. If you create a shipment before March 31 but it arrives after, it must follow the new FNSKU requirements.<\/p>\n\n\n\n A UPC (Universal Product Code) is the manufacturer’s barcode printed on the product packaging, it’s the same barcode used at any retailer. An FNSKU (Fulfillment Network Stock Keeping Unit) is an Amazon-specific barcode unique to your seller account. Using manufacturer barcodes provides advantages like cost savings and consistent inventory across multiple channels. However, only brand-registered sellers can select this option, while all other sellers must use Amazon FNSKU barcodes. <\/a><\/p>\n\n\n\n No. not if they hold the Brand Representative role in Amazon Brand Registry. Brand owners with the Brand Representative selling role in Amazon Brand Registry will no longer need to apply Amazon barcode stickers to prevent commingling for products that already have manufacturer barcodes. <\/a><\/p>\n\n\n\n Resellers without the proper FNSKU stickers will be marked by Amazon as “defective.” This will delay their sales and likely result in extra fees. <\/a><\/p>\n\n\n\n For brand owners and representatives, Amazon has stated that inventory currently in fulfillment centers or in transit will be allowed to sell through under the old system. <\/a>Plan to deplete existing commingled stock before or shortly after the deadline.<\/p>\n\n\n\n Yes. You can continue using commingled\/stickerless inventory for shipments that arrive<\/strong> at Amazon fulfillment centers before March 31, 2026.<\/p>\n\n\n\n![\"\"](\"https:\/\/ecomclips.com\/blog\/wp-content\/uploads\/2026\/03\/image-48-1024x785.png\")
<\/figure>\n\n\n\nHow Amazon Commingled Inventory Works in FBA<\/strong><\/h2>\n\n\n\n
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<\/figure>\n\n\n\nBenefits of Commingled Inventory<\/strong><\/h2>\n\n\n\n
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Risks of Amazon Commingled Inventory<\/strong><\/h2>\n\n\n\n
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<\/figure>\n\n\n\nWhy Amazon Is Ending Commingled Inventory in 2026<\/strong><\/h2>\n\n\n\n
Reason 1: Amazon’s Logistics Network Got Smarter<\/strong><\/h3>\n\n\n\n
Reason 2: The Counterfeit Problem Got Out of Hand <\/strong><\/h3>\n\n\n\n
Reason 3: Advanced Virtual Tracking Technology <\/strong><\/h3>\n\n\n\n
What Changes for Amazon Sellers in 2026 <\/strong><\/h2>\n\n\n\n
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<\/strong><\/li>\n\n\n\nWho Will Be Affected by This Update?<\/strong><\/h2>\n\n\n\n
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Pros and Cons of Amazon Ending Commingled Inventory<\/strong><\/h2>\n\n\n\n
Benefits of Ending Commingled Inventory<\/strong><\/h3>\n\n\n\n
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<\/figure>\n\n\n\nPossible Challenges<\/strong><\/h3>\n\n\n\n
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How Amazon Sellers Should Prepare for This Change<\/strong><\/h2>\n\n\n\n
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What Happens If You Don’t Comply?<\/strong><\/h2>\n\n\n\n
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Pro Tips for New Amazon Sellers After This Update<\/strong><\/h2>\n\n\n\n
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Future of Amazon FBA Inventory Management<\/strong><\/h2>\n\n\n\n
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Is This Change Good or Bad for Amazon Sellers?<\/strong><\/h2>\n\n\n\n
Frequently Asked Questions about Amazon Commingled Inventory 2026<\/strong><\/h2>\n\n\n\n
Q1. What is Amazon’s commingled inventory? <\/strong><\/h3>\n\n\n\n
Q2. Why is Amazon ending commingled inventory? <\/strong><\/h3>\n\n\n\n
Q3. When exactly does Amazon stop commingling inventory? <\/strong><\/h3>\n\n\n\n
Q4. Does the March 31, 2026 deadline apply to shipment creation or arrival?<\/strong> <\/h3>\n\n\n\n
Q5. What is an FNSKU and how is it different from a UPC?<\/strong><\/h3>\n\n\n\n
Q6. Do brand owners need FNSKU labels after March 31, 2026?<\/strong><\/h3>\n\n\n\n
Q7. What happens to resellers who don’t apply FNSKU labels after March 31? <\/strong><\/h3>\n\n\n\n
Q8. What happens to commingled inventory already at Amazon fulfillment centers? <\/strong><\/h3>\n\n\n\n
Q9. Can I still ship stickerless inventory before the deadline? <\/strong><\/h3>\n\n\n\n