Amazon’s commingled inventory allowed sellers to pool identical products under a manufacturer barcode, but this model is ending due to brand control, counterfeit risks, and regulatory pressure.
Commingled inventory, also called stickerless inventory, lets multiple sellers send identical products to Amazon fulfillment centers using only the manufacturer's barcode.
Amazon pooled these units together, shipping from the nearest available stock regardless of which seller originally sent it. This approach improved warehouse efficiency and delivery speed, but it also created vulnerabilities.
If one seller introduced counterfeit or expired goods, the entire pool was at risk, and brand owners lost control over product quality.
Due to mounting pressure from brands, regulators, and customers, Amazon is discontinuing commingled inventory. The timeline is clear:
After these dates, every FBA unit must be labeled with a unique FNSKU, linking each item directly to your seller account. This change increases the need for accurate, real-time inventory management and reconciliation.
Amazon tracked commingled inventory using lot codes and internal systems, but sellers faced risk during disputes, returns, and audits. When you shipped commingled inventory, Amazon received your products with manufacturer barcodes and pooled them with identical units from other sellers.
Ownership was tracked virtually using lot codes and percentage allocations, not by physically segregating your stock. When a customer ordered, Amazon shipped from the nearest available unit, then adjusted internal records to credit the correct seller.
Returns and damages complicated this process. If a customer returned a product or reported damage, Amazon notified you within 7–14 days.
You then had a 30-day window to dispute the claim. Because ownership was tracked virtually, proving which units were yours required detailed documentation.
Disputes often dragged on, and inventory mix-ups created reconciliation challenges. Systems that mirror Amazon’s tracking structure help sellers reconcile inventory faster and build stronger cases during disputes.
Misunderstandings about commingled inventory lead to costly mistakes. Here are the facts. Before you panic about the transition, let us separate fact from fiction about commingled inventory risks.
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Common Myth |
The Reality |
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Commingling always leads to inventory loss |
Amazon tracks ownership via lot codes, but disputes can be slow and require detailed documentation |
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You cannot dispute damages on commingled units |
You can dispute, but success depends on matching your records to Amazon’s tracking exactly |
|
Amazon always reimburses at full retail value |
Reimbursement is typically at your average selling price or Amazon’s calculated value, often lower than your cost |
Table: Common Myths vs Reality
The real risk comes from poor reconciliation practices, not commingling itself. With the commingling ending, these disputes become moot, but new compliance challenges require even tighter inventory control.
Every seller must migrate to FNSKU labeling before March 31, 2026. Here is your step-by-step plan. Commingling is ending. Transitioning to FNSKU labeling is mandatory for all FBA sellers.
Transition Checklist:
After March 31, 2026, any remaining commingled inventory will continue to ship out, but all new inbound stock must be FNSKU-labeled. Inventory and order sync tools help you track both old (commingled) and new (FNSKU) inventory in parallel during the transition.
Accurate, automated records are the only way to protect your business from reconciliation headaches during returns and damages. When a return or damage occurs, Amazon notifies you within 7–14 days. You have 30 days to dispute the claim and provide documentation.
To succeed, you need:
Manual reconciliation is slow and error-prone. Sellers using Webgility save up to 90% of time on reconciliation and close the books three times faster by automating returns, refunds, and inventory sync.
Transitioning to FNSKU labeling brings new costs and cash flow impacts. Planning ahead protects your margins.
Direct costs include:
For example, labeling 10,000 units at $0.12 per unit equals $1,200. Delays in labeling can add 3–5 days to your supply chain, increasing storage and carrying costs.
However, the ROI includes fewer lost units, faster reimbursement, and lower risk of compliance penalties. Track transition costs as a project or cost center in your accounting system with Webgility automation.
Amazon’s move to FNSKU aligns with industry trends. Multi-channel sellers must master SKU-level labeling everywhere.
Other platforms do not offer true commingling:
Amazon's new model brings it in line with its peers. Multi-channel sellers need unified SKU tracking, labeling, and reconciliation across all platforms. Managing these requirements manually across Amazon, Walmart, Shopify, and eBay creates operational bottlenecks and reconciliation errors.
Multi-channel inventory sync tools like Webgility automate tracking and reporting across all platforms, ensuring compliance everywhere.
A disciplined, weekly process is the only way to avoid compliance and financial headaches during the transition.
90-Day Transition Checklist:
Automated audit trails and reconciliation logs are your best defense against disputes and policy changes.
Amazon auditors request:
Automate audit trails using systems that log every transaction. Webgility’s automated reconciliation and logging provide an audit trail that resolves disputes 30–50% faster.
Suggested Read: Amazon Reporting Tools: Guide to Choosing for Your Needs
Webgility automates the critical workflows, inventory sync, returns, and audit trails that keep Amazon sellers compliant and profitable.
Webgility offers:
Trusted by 5,000+ ecommerce businesses, Webgility delivers real results. Channie’s increased order volume by 250%, and PartyMachines gained back 16 hours per week using Webgility.
The end of commingled inventory marks a fundamental shift in Amazon FBA operations. Sellers who act now will avoid compliance risks, control costs, and gain a competitive edge through real-time automation.
Start your transition plan today using the checklist above, and see how Webgility can help you automate your Amazon FBA transition.
To learn more about how Webgility fits in, get a demo.
Existing commingled inventory will continue to ship out, but all new inbound stock must be FNSKU-labeled.
Track these as a project or cost center in your accounting system. Webgility automates this process.
Your inventory may be stranded or delayed. Prepare early to avoid disruptions.
Use real-time automation tools like Webgility to reconcile orders, returns, and inventory across all channels.
Webgility automates inventory sync, returns, and audit trails, saving you time and reducing errors.