Service

UPC to GS1 Barcode Migration

Barcode mismatches resolved against the GS1 database, before they suppress the catalogue.

  • Amazon US
  • Amazon UK
  • Pan-EU
  • Canada
  • Australia
  • Japan
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Personal WhatsApp & Slack channel with our founder & Senior PPC Strategists. Zero junior account managers.

  • 100% account ownership retained
01The problem

Amazon punishes drift.

Very few brands have somebody whose whole job is this channel. So the work happens in the gaps between everything else, and the cost never arrives as a single bad day — it arrives quietly, as rankings that slip a place a week, ad spend that stopped converting two months ago, and listings nobody has read since they went live.

By the time it shows up in the revenue figure, you are not fixing this month. You are rebuilding a year of neglect against competitors who did not take the year off.

02What we do

How we run it

Catalogue mismatch errors resolved, a GS1 barcode transition blueprint written for your range, and Brand Registry brought back into sync with it.

Why this matters

Amazon checks product barcodes against the GS1 database and treats codes that don’t match GS1’s records as invalid. It removes listings with invalid barcodes, and using false or purchased product IDs can cost you ASIN creation or selling privileges, temporarily or permanently.

What is included

  • GS1 database match audits.
  • UPC to GS1 barcode transition blueprint mapping.
  • Brand Registry catalogue synchronisation.
  • Seller Support ticket coordination.
  • Product variation hierarchy fixes.

Questions about this service

Will we lose our customer reviews during barcode migration?

No. Our migration process updates the barcode reference while maintaining the existing ASIN and customer reviews.

Do we need a GS1 account?

Yes. You must register directly with GS1 to obtain certified GTIN barcodes for your brand.

UnverifiedtoGS1-registeredYour barcodes
At risktoCarried overYour reviews
SuppressedtoIndexedYour listings
03What is included

What you get, every month

The same standard of delivery whichever service you are on. No tiers, no upsell to reach the version that actually works.

  • A full audit before anything in your account changes
  • A written plan built against your real landed cost and margin
  • A named lead who knows your account and your products
  • The work done for you — your client dashboard is included, and reading it is optional
  • Weekly optimisation, not a monthly box-ticking report
  • Plain-English reporting you can read in five minutes
  • A change log, so you can see exactly what moved and when
  • Your accounts, listings and data stay yours — always
04How it works

Audit  Strategy  Launch  Scale

Audit

We go through the account, the listings and the ad spend and show you where the money is going. Free, and you keep the findings either way.

Strategy

A short written plan: what we change first, what we deliberately leave alone, what we expect it to do and how we will both know whether it did.

Launch

We do the work. Changes go in against the plan and land in the change log, so nothing happens to your account that you cannot trace back.

Scale

Weekly optimisation from there, with a report every fortnight that says what moved, what did not, and what we are doing about the second one.

05Proof

Real brands. Real numbers.

See all case studies

06FAQ

Questions brands ask us

How much does it cost?
It depends on the size of your account and the scope of work. You get a clear, fixed quote after the audit, with no hidden fees — and the audit itself costs nothing.

How soon will I see something change?
The quick wins — cutting wasted spend, fixing suppressed or broken listings — usually land in the first few weeks. Ranking and revenue move more slowly, because Amazon rewards consistency over months, not gestures.

Do I keep control of my account?
Always. You own the account, the listings, the ad history and the data. We work as a user on your account and you can revoke that access at any time, for any reason.

Can I take just this service?
Yes. Plenty of brands start with one thing and add the rest once they can see it working. We will tell you if we think a different one would move your number faster.

Does this apply to marketplaces other than Amazon?
Amazon is where we start and where most brands should. The same work carries over to eBay, Walmart, Shopify, Temu, TikTok Shop, Wayfair, B&Q and OnBuy once Amazon is stable, with the details adjusted for each platform.

What happens if it is not working?
You will hear it from us before you spot it yourself. The reporting is designed to make a flat month obvious, not to bury it — and if the plan is wrong, we would rather change the plan than defend it.
Forensic Amazon Audit

Find out what this is worth first.

Request your free Forensic Amazon Audit. We will look at your account, tell you what we would change and what we would expect it to do — then you decide. No obligation, and you keep the findings.

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