Amazon FBA Barcode Changes March 2026: What Every UK Seller Must Know
If you're a reseller on Amazon UK, the barcode rules are changing — and the deadline is 31 March 2026.
Starting 31 March 2026, Amazon will require all resellers to apply Amazon barcodes (FNSKU labels) to every unit sent to FBA — even if the product already has a manufacturer barcode. This changes the inbound workflow for thousands of UK sellers.
Products that previously went straight into a fulfilment centre using the original barcode will now need to be individually labelled before shipping. In this guide, we explain what is changing, who is affected, and what your options are.
All information in this article is based on Amazon's official documentation: Use Amazon barcodes for FBA (G200141490).
Resellers must use Amazon barcodes (FNSKU) for all FBA products. Brand owners enrolled in Brand Registry can continue using manufacturer barcodes.
What Exactly Is Changing?
Until now, if your product had a valid manufacturer barcode (UPC or EAN), you could send it to FBA without adding an Amazon label. From 31 March 2026, that option disappears for resellers.
| Seller Type | Before 31 March 2026 | After 31 March 2026 |
|---|---|---|
| Brand Owners (Brand Registry) | Can use manufacturer barcode | Can still use manufacturer barcode ✓ |
| Resellers | Can use manufacturer barcode | Must use Amazon barcode (FNSKU) ✗ |
In practice, this means every reseller must print FNSKU labels and apply them to each unit before sending inventory to Amazon.
Why Is Amazon Making This Change?
It comes down to inventory accuracy and commingling. When multiple sellers send the same product using the manufacturer barcode, those units get stored together. If one seller sends a counterfeit or damaged unit, it mixes with everyone else's stock — and any seller in that pool can have the bad unit shipped to their customer.
For brand owners, Amazon already has verification through Brand Registry. Resellers, who source from a wider range of suppliers, will now need individual labelling to maintain traceability.
What Happens If You Don't Comply?
Amazon is very clear about the consequences — and they are enforced consistently across UK fulfilment centres.
Inventory Refused or Disposed
Non-compliant shipments can be turned away, returned to you, or disposed of at your expense. Either way, you lose money and sales time.
Future Shipments Blocked
Repeated non-compliance can lead to Amazon blocking your ability to create new inbound shipments — effectively pausing your entire FBA business.
Unplanned Prep Fees
If a product arrives without an Amazon barcode, Amazon will label it and charge you an unplanned prep fee per unit. These fees add up fast.
Your Options: How to Prepare
You have three realistic paths forward.
Print FNSKU labels from Seller Central, buy a thermal printer and label stock, and apply them manually. Cheapest per unit, but time-consuming and risky if you make labelling errors.
Best for: Very low volume sellers (under 100 units/month).
Amazon applies FNSKU barcodes at the fulfilment centre for a per-unit fee. Convenient, but adds a direct cost and you still need to handle all other prep (polybagging, bundling, etc.) before shipping.
Best for: Sellers who want a quick fix and accept the per-unit cost.
A UK-based prep center handles everything: receiving your stock, inspecting it, applying FNSKU labels, covering existing barcodes, poly-bagging if needed, and shipping compliant inventory to Amazon.
Best for: Sellers who want to scale without worrying about compliance — and who value their time more than the cost of a label.
What You Need to Do Before March 2026
- Check your seller type — Are you a brand owner (Brand Registry) or a reseller? Only resellers are affected.
- Audit your catalogue — Identify all products currently using manufacturer barcodes that will need FNSKU labels after the deadline.
- Choose your labelling solution — DIY, Amazon's label service, or a prep center.
- Test before the deadline — Send a small trial shipment with FNSKU labels in February or March to confirm compliance.
- Monitor your Inbound Performance Dashboard — Check Seller Central for any defect reports related to labelling.
Don't Wait Until March. Get Compliant Now.
The barcode deadline is real. We handle the labelling, prep, and compliance — so your inventory arrives at Amazon ready to sell, not ready to be rejected.
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