How to Fix: Missing GTIN Barcode
Product has a brand or MPN, but no GTIN barcode is provided.
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Issue Root Cause and Repercussions
Manufacturers assign barcodes, but the e-commerce store omitted the barcode in Shopify/WooCommerce product settings.
Products with GTINs receive up to 40% higher impressions and conversions on Google Shopping. Missing GTINs will limit Free Listings visibility.
Step-by-Step Resolution Guide
Export your current raw product catalog from your e-commerce store (Shopify Admin > Products > Export or WooCommerce feed plugin).
Find the product's UPC/EAN from your supplier or packaging and populate the `gtin` field. If genuinely custom, handmade, or vintage, set `identifier_exists` to 'no'.
If custom/no-barcode item, safely set identifier_exists to 'no'.
Have a full product feed with this error?
Upload your CSV or XML feed to auto-clean all affected SKUs at once.
Related Google Merchant Center Errors
All 16 RulesInvalid GTIN Check Digit (Mod-10)
The GTIN (UPC, EAN, or ISBN) failed the GS1 Mod-10 check digit algorithm.
Incorrect identifier_exists: 'no' on Branded Products
Marked as identifier_exists: 'no' despite having a major commercial brand.
Sale Price Greater Than or Equal to Regular Price
The sale_price value is equal to or higher than the regular price.
Missing or Inaccessible Image Link
Missing image_link or URL is not a valid HTTP/HTTPS link.