In this help center, you can find content for both Merchant Center Next and the classic Merchant Center experience. Look for the logo at the top of each article to make sure you're using the article for the Merchant Center version that applies to you. 

How to fix: Incorrect value: identifier exists [identifier_exists]

This item has an internationally recognized unique identifier. Submit a valid GTIN, and either set this value to true or remove this value.

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You’ve submitted a value of false for the identifier exists [identifier_exists] attribute for a product that we believe has a Global Trade Item Number (GTIN), based on the use of this identifier in similar offers.

Update your product with the correct value for the GTIN [gtin] attribute to help make your ads and listings richer and easier for customers to find. Offers without accurate identifiers will have warnings applied until that information is provided.

You must only use GTIN numbers that have been assigned by the manufacturers of these products.

If your product has a barcode, you can normally find the GTIN on the packaging.

To verify the ownership data of the GTINs that you provide, use the GS1 GEPIR tool provided by the GS1 organization. For more information about the validation of GTINs, refer to the GTIN Validation Guide edited by GS1.


See the affected products

  1. Sign in to your Merchant Center account.
  2. Select Products on the navigation menu, then click Diagnostics.
  3. Click the Item issues tab to view current issues affecting your products.

To download a list (.csv) of all affected products for all issues:

  • Click the download button Download next to the filter button Download, beneath the graph and above the list of issues.

To download a list (.csv) of all affected products for a particular issue:

  • Find the issue under the “Issue” column, then click the download button Download at the end of the row.

To view a list of up to 50 products with this particular issue:

  • Find the issue under the “Issue” column, then click View examples in the “Affected items” column.

Add unique identifiers for each product

  1. Filter the downloaded report so that you only see products with:
    "Issue title" = Incorrect value: identifier exists [identifier_exists]
  2. Search your product data for those products (using the ID). Remove the identifier exists [identifier_exists] attribute, or change the value to true and then provide a valid identifier using the GTIN [gtin] attribute. Make sure that you submit an accurate GTIN for each product. Not submitting a GTIN may result in limited performance for your item.

Resubmit your product data

  1. After you’ve updated your product data, resubmit it using one of these methods:
  2. Next, check that you’ve fixed the issue by making sure it’s no longer listed on the Diagnostics page.

    Keep in mind: It may take some time for your change to be reflected on the Diagnostics page.
If you’re working with a third-party platform, some of these instructions may not apply to you. Refer to your third-party platform for instructions on how to resolve the issue and request a review. Learn how to find support if you use a non-Google platform.

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