"Invalid value [gtin]" in Google Merchant Center means the barcode number you sent for a product is not one Google accepts. It is a different issue from the missing GTIN warning. This guide covers the format rules Google checks and how to correct the value.
What the issue means
Google's help page says the issue occurs when you have entered an invalid value for the GTIN attribute. The fix it gives is to send a GTIN that is valid and that identifies that specific product. Google's product data specification adds that an incorrect GTIN causes disapproval.
- Issue: Invalid value [gtin]
- Where it appears: Products, then the Needs attention tab
- Fix: A valid GTIN for that exact product, or no GTIN if the product has none
The format Google accepts
A GTIN is a number. Google accepts spaces and dashes but ignores them, and the value must have 8, 12, 13 or 14 digits.
| Type | Digits |
|---|---|
| UPC, used in North America | 12, with 8-digit UPC-E codes converted to 12 |
| EAN, used in Europe | 13 |
| JAN, used in Japan | 8 or 13 |
| ISBN, for books | 13, with ISBN-10 converted to ISBN-13 |
| ITF-14, for multipacks | 14 |
Why a GTIN fails
A number with the right length can still be invalid. Google's GTIN page lists minimum requirements beyond the digit count.
- Check digit: The last digit has to be present and correct. Google points to the GS1 check digit calculator
- Restricted prefixes: GTINs starting with 02, 04 or 2 are not accepted
- Coupon prefixes: GTINs starting with 05, 98 or 99 are not accepted
- Reuse: Each variant, such as a size or color, needs its own GTIN
- Guesses: Google says not to guess or make up a value
In practice, look for digits lost in a spreadsheet, a SKU or internal code typed into the barcode field, and one barcode copied across every variant.
Correct the value
Google gives two routes. For one product, open the Needs attention tab, filter to the affected products, click the product title, choose Edit product, enter a valid GTIN and select Save. For many products, download the .csv list of affected products, check the GTINs against your own product data, correct them at the source and upload again.
Google says changes may take 24 to 72 hours to show on the Needs attention page.
If the product has no GTIN
Some products have no manufacturer barcode, and Google says not to submit a GTIN for them. Its guidance is to provide a GTIN only if you are sure it is correct.
- ✅ Store-brand and private-label products: send brand and MPN instead
- ✅ Custom-made items: leave GTIN blank if the manufacturer assigned none
- ❌ A placeholder or invented number to fill the field
If the product does have a real GTIN, removing the wrong one is not enough: Google says products submitted without their assigned GTIN may have limited visibility. See the GTIN warning guide for that case.
Doing this at scale
FeedFix checks every product against Google Merchant Center and Meta Catalog rules and scores each one from 0 to 100 per channel, which helps you find the products with data problems before you open them one by one. It also drafts compliant title and description rewrites you review as before/after diffs and apply in bulk, with every change audit-logged. See FeedFix.