Stickerless, Commingled Inventory: What It Was and Why Amazon Is Ending It

Published: February 27, 2017
Last updated: May 01, 2026

Stickerless, commingled inventory was Amazon’s system for pooling identical products from multiple sellers in its fulfillment centers. Instead of tracking each seller’s individual units, Amazon treated all units of the same product as interchangeable - fulfilling orders with whichever unit was closest to the buyer, regardless of which seller sent it in.

Amazon is ending commingling on March 31, 2026. After that date, all FBA inventory must be individually tracked by seller. Brand owners will use manufacturer barcodes, and resellers must apply FNSKU labels to every unit.

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Table of Contents

1. What Was Commingled Inventory?
2. Why Amazon Is Ending Commingling
3. Timeline and Key Dates
4. New Barcode Requirements by Seller Type
5. What Happens to Non-Compliant Inventory
6. How to Prepare for the Transition
7. Impact on Different Seller Types
8. FAQs

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What Was Commingled Inventory?

Commingled inventory - also called stickerless inventory - was a Fulfillment by Amazon feature that allowed sellers to send products to Amazon’s warehouses without applying individual FNSKU barcode labels.

How It Worked

Under commingling, Amazon used the product’s manufacturer barcode (UPC or EAN) instead of a seller-specific FNSKU to track inventory. When a buyer placed an order from Seller A, Amazon would ship the nearest available unit of that product - even if that specific unit was sent in by Seller B.

This meant:

• The item identity was tracked, not the seller identity - any unit of the same product could fulfill any seller’s order
• No FNSKU labeling was required - sellers shipped products with only the manufacturer barcode
• Amazon chose the nearest unit - fulfillment was based on proximity to the buyer, not which seller owned the specific unit

Benefits Commingling Offered

While it was active, commingling provided two main advantages:

1. Faster shipping - Amazon could ship from whichever fulfillment center was closest to the buyer, reducing delivery times
2. No labeling work - Sellers avoided the time and cost of applying FNSKU stickers to every unit, which Amazon estimated cost brand owners approximately $600 million per year collectively

Eligibility (Historical)

Not all products qualified for commingling. Items had to be:

• New and in mint condition (no used, damaged, or open-box items)
• Non-expiring (no products with expiration dates)
• Scannable with a clear manufacturer barcode (UPC or EAN) tied to a single ASIN
• Non-media (books, DVDs, CDs, software, and video games were excluded)

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Why Amazon Is Ending Commingling

Commingling created a significant problem: counterfeit and quality contamination. Because units from different sellers were pooled together, a buyer who ordered from a reputable seller could receive a counterfeit or inferior unit that was actually sent in by a different, less scrupulous seller.

This caused:

• Brand integrity issues - brand owners had no control over which physical unit a buyer received, even if the order was placed on the brand’s own listing
• Counterfeit complaints attributed to the wrong seller - legitimate sellers received negative reviews and A-to-Z claims for counterfeit products they never shipped
• Difficulty tracing the source - when a defective or counterfeit unit surfaced, Amazon could not easily identify which seller originally sent it

By ending commingling, Amazon ensures that every unit can be traced back to the specific seller who sent it. This protects both buyers and legitimate sellers.

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Timeline and Key Dates

Date	Change
January 1, 2026	Amazon discontinues all FBA prep and labeling services - sellers must prep and label inventory themselves
March 31, 2026	Commingling ends completely - all inventory must be tracked by individual seller
April 1, 2026	Non-compliant inventory (without proper barcodes) treated as defective

The end of commingling is part of Amazon’s broader 2026 supply chain changes, which also include the discontinuation of FBA prep services and significantly increased inbound defect fees.

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New Barcode Requirements by Seller Type

After March 31, 2026, barcode requirements depend on whether you are a brand owner or a reseller.

Brand Owners (Brand Registry Enrolled)

Brand owners registered in Amazon Brand Registry can use manufacturer barcodes (UPC or EAN) to track their inventory. This is a significant simplification - brand owners no longer need to apply FNSKU labels over their own barcodes.

• No FNSKU required - your manufacturer barcode serves as the tracking identifier
• Inventory is yours alone - even though you use a manufacturer barcode, your units are no longer pooled with other sellers
• Cost savings - eliminates the labeling burden that Amazon estimated cost brand owners $600 million annually

Resellers (Not the Brand Owner)

Resellers who sell products they did not manufacture must apply FNSKU barcodes to every unit sent to FBA.

• FNSKU is mandatory - manufacturer barcodes alone are not sufficient for resellers
• Every unit must be labeled - there is no exception or opt-out
• Labels must meet Amazon’s specifications - scannable, properly placed, covering the manufacturer barcode

Barcode Requirements Summary

Seller Type	Required Barcode	FNSKU Needed?
Brand owner (Brand Registry)	Manufacturer barcode (UPC/EAN)	No
Reseller	FNSKU	Yes - on every unit
Private label seller (Brand Registry)	Manufacturer barcode (UPC/EAN)	No
Private label seller (not registered)	FNSKU	Yes

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What Happens to Non-Compliant Inventory

After March 31, 2026, inventory that arrives at Amazon’s fulfillment centers without proper barcodes will be treated as defective.

This means:

• Units may be rejected at receiving - shipments that do not meet barcode requirements may not be accepted
• Inbound defect fees apply - Amazon’s inbound defect fees increased 10-80x in 2026 (standard items: $0.32-$1.74 per unit; bulky items: up to $5.72 per unit)
• Inventory may be disposed of - Amazon may choose to dispose of non-compliant inventory rather than store it

The financial consequences of non-compliance are severe. With inbound defect fees at their current levels, sending improperly labeled inventory is far more costly than investing in proper prep and labeling.

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How to Prepare for the Transition

If You Are a Brand Owner

1. Verify your Brand Registry enrollment - ensure your brand is active in Amazon Brand Registry
2. Switch to manufacturer barcode tracking in your inventory settings in Seller Central
3. Confirm your barcodes are scannable - manufacturer barcodes must be clear, undamaged, and tied to a single ASIN
4. Stop applying FNSKU labels - once switched, your manufacturer barcode handles all tracking

If You Are a Reseller

1. Set up FNSKU labeling - if you were previously using commingled inventory, you now need a labeling process
2. Purchase labeling supplies - thermal label printers (Dymo, Rollo, or Zebra) and compatible labels
3. Apply FNSKU barcodes to every unit before shipping to Amazon
4. Cover existing manufacturer barcodes - FNSKU labels must be placed over the manufacturer barcode to prevent scanning errors
5. Build labeling into your workflow - with FBA prep services discontinued, this is entirely your responsibility

For All Sellers

• Audit current inventory - check what you currently have in FBA warehouses and whether it meets the new requirements
• Update shipping workflows - ensure all future shipments comply before the March 31 deadline
• Consider third-party prep services - if you lack the capacity to label inventory in-house, outsource to a prep center

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Impact on Different Seller Types

Brand Owners

The end of commingling is largely positive for brand owners. You gain:

• Full traceability - every unit in FBA is definitively yours
• No more counterfeit contamination - buyers who order from you receive your inventory, not someone else’s
• Simplified labeling - manufacturer barcodes replace FNSKU for Brand Registry sellers
• Cost reduction - no more labeling expense

Resellers

The end of commingling adds work and cost for resellers:

• Mandatory FNSKU labeling - every unit requires a label
• No more prep services from Amazon - you handle labeling yourself or pay a third-party prep center
• Higher per-unit costs - labeling supplies, labor, and potentially prep service fees

Private Label Sellers

Private label sellers who are enrolled in Brand Registry benefit the same way as brand owners. Those who are not enrolled must use FNSKU labels like resellers.

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FAQs

Is Amazon really ending commingled inventory?

Yes. Amazon is ending all commingling practices on March 31, 2026. After that date, every seller’s inventory is tracked individually. The commingling option in Seller Central inventory settings will no longer be available.

Why did Amazon end commingling?

The primary reason is counterfeit and quality control. Commingling made it impossible to trace which seller supplied a specific unit to a buyer, enabling counterfeit products to contaminate legitimate inventory pools.

Do brand owners still need FNSKU labels?

No. Brand owners enrolled in Amazon Brand Registry can use their manufacturer barcodes (UPC or EAN) for inventory tracking. This eliminates the need for FNSKU labels.

Do resellers still need FNSKU labels?

Yes. Resellers must apply FNSKU barcodes to every unit. This is mandatory and there is no opt-out.

What happens if I send inventory without proper barcodes after March 2026?

Non-compliant inventory will be treated as defective. You will incur inbound defect fees ($0.32-$1.74 per standard unit, up to $5.72 per bulky unit), and Amazon may reject or dispose of the inventory.

Can I still use commingled inventory before March 31, 2026?

The commingling feature may still be technically available until the cutoff date, but sellers should transition early to avoid last-minute compliance issues.

How much does FNSKU labeling cost?

Thermal labels typically cost $0.02-$0.05 per unit for materials. A thermal label printer costs $100-$300. Third-party prep services charge $0.20-$1.00+ per unit for labeling. With Amazon no longer offering prep services, these costs are now borne entirely by the seller.

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Summary

Stickerless, commingled inventory is ending on March 31, 2026 - a major change for all FBA sellers:

• What it was - Amazon pooled identical products from multiple sellers, shipping whichever unit was closest to the buyer regardless of which seller sent it
• Why it is ending - counterfeit contamination and traceability issues made commingling a liability for brands and buyers
• Brand owners benefit - manufacturer barcodes replace FNSKU, saving the estimated $600 million/year collective labeling cost
• Resellers must adapt - FNSKU labeling is now mandatory on every unit, with no Amazon prep services available
• Non-compliance is costly - inbound defect fees of $0.32-$5.72 per unit apply to improperly labeled inventory
• Prepare now - audit inventory, set up labeling workflows, and update Seller Central settings before the deadline