Effective March 31, 2026, Amazon is fundamentally changing how it handles Fulfillment by Amazon (FBA) inventory. The company is ending commingling, the practice of fulfilling orders with inventory from any seller, regardless of who the customer purchased from, and tightening barcode requirements based on seller type. This shift will create two distinct pathways: Brand Registry members with Brand Representative roles can operate stickerless using manufacturer barcodes, while resellers and unregistered sellers must use Amazon barcode stickers for all new FBA shipments.
What Is Commingling and Why Is Amazon Ending It?
Commingling has been a cornerstone of Amazon’s fulfillment strategy. When a customer orders a product, Amazon fulfills that order using the closest inventory match available across its fulfillment network, regardless of which seller originally sent it. This approach prioritizes speed and delivery performance.
Example: If you send 500 units of Product X to an Amazon warehouse in New Jersey, and a customer in Pennsylvania orders the same product, Amazon might ship a unit from a warehouse in Delaware (even if it came from a competitor’s shipment) because it’s closer and arrives faster.
Amazon states that most sellers now maintain inventory levels that keep products close to customers geographically. This means the company can achieve fast delivery performance without relying on pooled inventory from multiple sellers. By ending commingling, Amazon achieves several objectives:
- Clearer accountability: Each customer receives only inventory tied to the seller they purchased from
- Reduced quality and authenticity issues: Bad actors can no longer hide defective or counterfeit products in pooled bins
- Improved traceability: Returns, removals, and inventory issues are directly tied to the original seller
- Simplified operations: Sellers have direct control over their inventory flow
New Barcode Requirements: The Two-Tier System
Starting March 31, 2026, barcode eligibility depends entirely on your selling role and Brand Registry status.
Brand Owners with Brand Representative Role
Benefit: Stickerless FBA
If you are enrolled in Amazon Brand Registry with a Brand Representative selling role, you can send FBA inventory using manufacturer barcodes (UPC, EAN, ISBN) without applying Amazon barcode stickers, provided the product meets stickerless eligibility requirements.
Key advantages:
- No pre-allocation of inventory to Amazon
- Single inventory pool for Amazon and other sales channels
- Reduced labeling costs
- Greater inventory flexibility
Requirements:
- You must be the brand owner (direct responsibility for product quality and authenticity)
- The product must have a valid manufacturer barcode (GTIN)
- The product must meet Amazon’s virtual tracking eligibility criteria
- You must maintain Brand Representative status with the Brand Administrator
Resellers and Other Sellers
Requirement: Amazon Barcode Stickers Mandatory
All resellers, including authorized resellers approved by brands, must use Amazon barcode stickers for all new FBA shipments after March 31, 2026, even if the product already has a manufacturer barcode.
Why this distinction?
Amazon distinguishes between brand owners and resellers based on control and accountability:
- Brand owners procure or control manufacturer GTINs directly and are responsible for product quality and authenticity
- Resellers require barcode tracking to ensure inventory separation and proper attribution, as multiple sellers may offer the same product
Consequences of non-compliance:
Any inventory sent without Amazon barcode stickers for shipments created after March 31 will be processed as defective upon receipt and may not be eligible for reimbursement.
Action Items by Seller Type
For Brand Owners with Brand Representative Role
Step 1: Verify Your Role
In Seller Central, navigate to Brands → Build your brand → View registered brands and confirm your selling role is set to “Brand Representative” for the relevant brands.
If you are currently listed as a “Reseller,” contact your Brand Administrator to request a role upgrade to Brand Representative.
Step 2: Determine Eligible Products
Use Amazon’s tools to identify which SKUs can use manufacturer barcodes:
- Check the “Use manufacturer barcodes for FBA” eligibility tool
- Review which ASINs have valid standard product identifiers (GTINs)
- Note any products with GTIN exemptions (these still require Amazon stickers)
Step 3: Convert Eligible Listings
You have two methods to convert inventory:
- Individual SKU conversion (small-scale):
- Go to Inventory → Manage All Inventory
- Search for the ASIN or SKU
- Click the three-dot menu and select Add another condition
- Create a new SKU that explicitly uses “Manufacturer barcode” as the barcode type
- Submit the new offer
- Bulk conversion (large-scale):
- Navigate to Fulfillment by Amazon Settings
- Scroll to FBA Product Barcode Preference and click Edit
- Download the Manufacturer Barcode conversion template
- Generate a spreadsheet of all ASINs using manufacturer barcodes
- Update the template with required fields
- Upload the completed file to Seller Central
Step 4: Manage the Impact of New SKUs
Creating new SKUs triggers several operational changes:
| Area | What Happens to the New SKU |
| Inventory recommendations | New SKU starts fresh; consider closing old SKU |
| Pricing recommendations | Not immediately available; apply past recommendations |
| Advertising recommendations | Not shown until sufficient customer views |
| Reviews and feedback | Protected; metrics tied to ASIN, not SKU |
| Virtual bundles | Must be recreated for new SKU |
| Subscribe & Save | Must be manually transferred or recreated |
| Seller Fulfilled Prime eligibility | Must re-check and re-enroll if needed |
| Sponsored Products and Deals | Not auto-applied; must set up for new SKU |
Table 1: Impact of Creating New SKUs
Step 5: Handle Exception Cases
Some products cannot use manufacturer barcodes and will always require Amazon stickers:
- Products with GTIN exemptions
- Products without valid standard product identifiers
- Products on restricted/controlled lists
For these items, you may want to create parallel SKUs using Amazon barcodes, or continue using Amazon barcodes for all inventory if you prefer operational simplicity.
For Resellers and Non-Brand-Representative Sellers
Step 1: Download Your Impacted ASIN List
Amazon has provided an ASIN report showing which products will require Amazon barcode stickers. Download this list immediately, it is your definitive transition checklist.
Step 2: Create New SKUs with Amazon Barcodes
For each ASIN on the impacted list, create a new offer/SKU that uses Amazon barcode tracking:
- Go to Inventory → Manage All Inventory
- Search for the affected ASIN
- Click the three-dot menu and select Add another condition
- Create a new seller SKU (you cannot reuse the old one for FBA)
- On the Convert to Fulfillment by Amazon page, select Amazon barcode as the barcode type
- Complete all required fields and submit
Alternatively, use the bulk listing upload tool if you have hundreds of SKUs to convert.
Step 3: Print and Label
Once your new SKUs are created:
- Download Amazon barcode labels (X00 format) from Seller Central
- Print labels on appropriate label stock
- Apply one label per unit before sending to Amazon
- There is no labeling fee for Amazon-generated barcodes
Step 4: Run Down Old Inventory
Your existing stickerless inventory can continue selling under current SKUs through April 2026 and beyond:
- Existing units already in FBA will sell as-is (no relabeling required)
- New inventory must use the new stickered SKUs
- Separate old and new SKUs to avoid confusion
- Monitor inventory aging to prevent excess stock penalties
Step 5: Leverage the Fee Waiver
Amazon is waiving low-inventory-level fees for affected ASINs through April 2026. Use this window to:
- Gradually deplete old stickerless inventory
- Ramp up new stickered inventory without penalty
- Plan your inventory replenishment without fee pressure
Step 6: Avoid Non-Compliance
After March 31, 2026:
- Any shipment sent without Amazon barcode stickers is treated as defective
- Defective inventory may be hard to recover or get reimbursed
- Process-corrected barcodes are not guaranteed to be reimbursable
- Transition early rather than at the last minute
Special Cases and FAQs
Can Authorized Resellers Use Stickerless Inventory?
No. After March 31, 2026, all resellers, even those approved by the brand, must use Amazon barcode stickers. Brand Representative status is the only exemption.
However, if you are an authorized reseller and want access to stickerless inventory benefits, you can request that the brand’s Administrator assign you a Brand Representative selling role (instead of Reseller). This requires direct approval from the brand.
What Happens to My Existing Inventory?
Inventory already in or in-transit to FBA as of March 31, 2026:
- Continues to sell as-is under current SKUs
- No relabeling or removal required
- No defective processing applied
- Rules only apply to new shipments created after March 31
Will I Lose Reviews and Seller Feedback?
No. Reviews and seller feedback are tied to your ASIN and seller account, not to individual SKUs. Creating a new SKU will not impact:
- Customer reviews
- Star ratings
- Seller feedback score
However, you may lose:
- Inventory recommendations (tied to specific SKU)
- Some pricing nudges (tied to specific SKU)
- Advertising recommendations (until new SKU has sufficient views)
What About Products with Multiple ASINs?
Some products are assigned the same manufacturer barcode (GTIN) but have multiple ASIN listings (for example, different colors or sizes, or duplicate listings). If you encounter this situation:
- Each ASIN may have different stickerless eligibility
- You may need to convert some ASINs but not others
- Consult Amazon’s barcode eligibility tool for each specific ASIN
- Contact Seller Support if you need clarification on borderline cases
How Should I Plan Multi-Channel Inventory?
For brand owners:
Ending commingling removes the need to pre-allocate inventory. A single stock unit can now flow to Amazon, your own website, or other channels without pre-stickering for Amazon:
- Create a unified inventory pool
- Manage stock based on demand signals from all channels
- Reduce the need for safety stock
- Simplify warehouse operations
For resellers:
Your inventory allocation strategy does not change materially, you still send stickered units to Amazon, but you gain clarity that inventory will not comingle with competitors on the shelf.
Timeline and Deadlines
| Date | Event |
| Now – March 30, 2026 | Verify your Brand Registry role; download impacted ASIN list; create new SKUs; print and label inventory |
| March 31, 2026 | End of commingling; all new shipments must comply with new barcode requirements |
| April 30, 2026 | Last day of low-inventory-level fee waiver for affected ASINs |
| May 1, 2026+ | Standard inventory health fees resume |
Strategic Implications
For Brand Owners
These changes represent an opportunity to:
- Consolidate inventory management across channels
- Reduce complexity by eliminating pre-allocation
- Strengthen brand control over supply chains and product quality
- Improve cash flow by maintaining unified inventory
- Enhance visibility into which channel drives sales
For Resellers
These changes increase operational overhead:
- Higher labeling costs and effort
- SKU proliferation (managing old and new SKUs)
- Loss of commingling benefits for delivery speed (you must maintain strong regional inventory)
- Inventory management complexity during the transition period
Consider this as a signal to:
- Professionalize inbound processes
- Build discipline around SKU and barcode management
- Seek official approval or partnership status with brands where possible
- Invest in inventory planning tools
Critical Transition Considerations
Starting January 1, 2026, before the March 31 commingling deadline, Amazon is ending its optional prep and labeling services. This means:
- Amazon will no longer label, poly-bag, bundle, or perform other prep work on incoming inventory
- Sellers (or third-party prep providers) must now handle all labeling and packaging preparation
- This compounds the barcode transition, as you must now manage both the new barcode requirements AND handle your own labeling logistics
Plan ahead: If you currently use or have used Amazon’s prep services, you need to establish or outsource your own prep and labeling process by January 1, 2026.
While March 31, 2026 is the official effective date, Amazon may implement these changes on a category-by-category basis. Some product categories may see the commingling phase-out and new barcode requirements take effect earlier or later than others. Monitor your Seller Central dashboard and category-specific announcements for any early implementation signals.
Complexity for High-Volume and Non-Barcode Products
The transition steps outlined above assume straightforward scenarios. However, sellers with high volumes, complex packaging, or products lacking manufacturer barcodes may face significant operational challenges:
- High-volume relabeling: Converting thousands of units from stickerless to stickered inventory requires substantial logistics coordination
- Custom packaging: Products with integrated or watermarked barcodes may require packaging redesign
- Products without GTINs: Items lacking manufacturer barcodes have no shortcut; they require Amazon stickers regardless of seller type, and your only option is to create new stickered SKUs
Many sellers are treating this as a hard reset of their inbound-to-FBA workflows, rather than a simple SKU conversion. Budget time and resources accordingly.
Additional Resources
For detailed guidance on specific processes, refer to:
- FBA Barcode Choice and Labeling FAQ – comprehensive Q&A on all barcode scenarios
- How to Switch to Manufacturer Barcodes – step-by-step guide for brand owners
- Change to Amazon Barcodes by Creating a New Product Offer – detailed instructions for resellers
- Brand Registry Selling Roles – information on role assignment and benefits
- Amazon Seller Forums – community discussions and seller experiences (ongoing discussions of seller experiences and edge cases)
Conclusion
Amazon’s decision to end commingling is a structural shift that clarifies accountability, improves inventory traceability, and simplifies fulfillment logistics. The barcode changes create a clear two-tier system: brand owners with Brand Representative status enjoy stickerless flexibility, while resellers must label all new inventory.
The transition period from now through March 31, 2026 is your window to prepare. Brand owners should identify eligible products and plan SKU conversions. Resellers should download their impacted ASIN lists, create new stickered SKUs, and begin labeling production. Both groups should take advantage of the low-inventory-level fee waiver to execute a smooth transition without financial penalties.
By treating this deadline seriously and preparing early, you can minimize operational disruption and position your business for success in Amazon’s post-commingling fulfillment environment.
Key Takeaways for Action
Immediate priorities (December 2025 – January 2026):
- Verify your Brand Registry status if you own brands, or confirm you’re classified as a reseller
- Establish or contract your prep and labeling process before Amazon’s prep services end on January 1, 2026
- Download your impacted ASIN list (resellers) or run the eligibility tool (brand owners)
- Start a pilot SKU conversion for a small batch to test your new labeling and inbound workflow
Ongoing (February – March 2026):
- Create new SKUs systematically using either manufacturer barcodes (brand owners) or Amazon stickers (resellers)
- Print and organize labels with sufficient buffer time for labeling and packing
- Execute new shipments under the new barcode rules while old inventory depletes
- Monitor category-specific announcements in case your products fall into an earlier rollout phase
After March 31, 2026:
- All new FBA shipments must comply with the new barcode requirements
- Non-compliant inventory will be flagged as defective
- Existing inventory in FBA continues to sell; no retroactive action needed
The stakes are clear: this is not a recommendation or guideline, it is a mandatory operational shift. Sellers who prepare early will execute smoothly; those who wait until March will face rush labeling, SKU creation bottlenecks, and inventory management chaos. Treat this as one of your most critical 2026 deadlines.