Guide

The same barcode is on all my variants. Does that matter for EU parcels?

It's a common find for merchants as they tidy up for the EU's product identifier rule: a parent barcode copied onto every size and colour. It's worth fixing, and it's usually quick.

Why it matters

Shopify saves the identifiers on each variant and reuses them on every label and customs declaration for that variant. So if five variants share one barcode, that one number goes out for all five.

GS1, the body that issues GTINs, says each variation (each size, each colour, and each combination) needs its own GTIN. A number copied across variants describes one of them at best.

How to find the copies

Export and sort. Export your products as a CSV and sort by the Barcodes column (older exports call it Barcode). Repeated values sit next to each other. A cell can hold more than one barcode, separated by semicolons, so also look for the same number inside different cells.
Use Shopify's free GS1 check. Since 29 October 2026, Shopify checks barcodes against the GS1 registry. It won't usually spot one number repeated across the variants of a single product, but if the registry has a barcode registered to a different product, you can hover over it to compare. It's for your information only and changes nothing on its own.

What to put instead

The variant has its own barcode (on the packaging, or from the maker): enter it with the GTIN, EAN, UPC or ISBN type. Shopify also accepts a Custom barcode that's a valid 8, 12, 13 or 14-digit GTIN, and its GS1 suggestions can switch those to the GTIN type, in bulk if you like.
It genuinely has none (handmade, made to order, own label never registered): clear the copied number and turn on "Has no standardized identifier" for that variant. Don't type "None" or a made-up number.

For lots of products, Shopify's help says you can use a CSV import or the bulk editor. Our main checklist covers all three identifiers.

If new variants keep copying the barcode

Merchants have reported new variants picking up the parent's number. Check each new variant before you save, and if it keeps happening, check whether an app that edits products is writing to the barcode field.

Shopify labels

Shopify's help says that for an EU parcel worth €150 or less, a label bought in the Shopify admin can't be bought while an item has neither a standard barcode nor the declaration. You can fix it on the label page under "Edit customs declaration". If you buy labels elsewhere, ask your carrier how they want identifiers sent.

Want a second pair of eyes?

Our free check (it's ours) runs in your browser and flags missing, invalid, placeholder and repeated barcodes in your Shopify export. Our $49 Check (USD, one-off) goes through the same file and sends back a checked file plus a handover file for your carrier. It never makes up barcodes. This is general information, not legal or customs advice, and we're not customs brokers.

Sources

Written with AI assistance by Your Evenings Ltd. Last updated: 2 November 2026.