Google Merchant Center Invalid GTIN: What It Means and How to Fix It

Quick Answer

Your GTIN (barcode number) failed validation. Verify you are using the correct GTIN for each specific product—typically found on the product barcode or packaging. Do not guess or make up numbers.

What This Issue Means

GTIN (Global Trade Item Number) is a unique identifier for products. Google validates GTINs against official databases. If your GTIN does not match the product, is malformed, or is not registered, your listing will be rejected.

Why It Happens

• Typo in the GTIN field
• Using a GTIN that belongs to a different product
• GTIN is not registered or recognized in Google's database
• Product does not have a valid GTIN (e.g., custom-made items)
• GTIN belongs to your supplier, not your product
• Mismatched GTIN and MPN combination

What to Check First

• Locate the correct GTIN on the actual product packaging or barcode
• Verify the GTIN matches the specific product (not similar items)
• Confirm the product is not custom-made (custom items do not need GTIN)
• Cross-check with your supplier if you are a reseller
• Ensure the MPN and brand are also correct

Evidence to Prepare

• Photo of the product barcode (EAN, UPC, or ISBN)
• Product packaging showing the GTIN
• Supplier invoice with the product's GTIN
• Screenshot of your feed data showing the GTIN field

Step-by-Step Recovery Path

1. Find the actual GTIN on the physical product or its packaging
2. Enter the exact GTIN in your product feed
3. If the product is custom or a bundle, set gtin to empty and add 'identifier_exists' = 'no'
4. Resubmit the product feed
5. If validation still fails, check if the GTIN is registered in Gs1.org

Mistakes to Avoid

• Making up or guessing a GTIN
• Using the supplier's GTIN when you are a reseller and not authorized
• Using the same GTIN for multiple similar products
• Not setting identifier_exists to 'no' for products without valid GTINs
• Not checking if the product is actually a bundle that needs different handling