How to fix: Incorrect product identifier [mpn]

Use a valid Manufacturer Part Number (MPN). Submit a valid value or remove the current invalid value for this attribute and resubmit your product data.
You may see a warning on your Diagnostics page due to an issue with the MPN [mpn] attribute for one or more of your products. Please review the instructions below and update this attribute for all affected products by September 2021 to prevent products from being disapproved.

A product's MPN is used to uniquely identify it amongst all of the products produced by a manufacturer. Potential customers may search for a specific MPN when looking to make a purchase. Consequently, providing the correct MPN can help ensure that your product is shown in relevant situations.

For one or more of your products, you've submitted a value for the MPN [mpn] attribute that may be incorrect. As a result, these products have been warned and may be disapproved for ads or free listings.

To resolve this issue, provide a valid value for the MPN attribute. Only use MPNs that have been assigned by the manufacturer rather than a reseller or a distributor. Also, ensure that the corresponding brand name is correctly submitted via the brand [brand] attribute. If the product doesn't have an MPN, clear the current value and leave the field blank.


Step 1: 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 see 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 Filter, 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 see 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.

Step 2: Update the MPN attribute value

  1. Filter the downloaded report so that you only see products with:
    'Issue title' = Incorrect product identifier [mpn].
  2. Search your product data for those products (using the ID) and:
    • Make sure that you're submitting a valid MPN value.
    • Don't provide the MPN in the ID [id], title [title], or description [description] attribute. Instead, add it to the MPN [mpn] attribute.
    • Check that the brand [brand] attribute is correct.
    • If the product has no MPN, leave this attribute blank rather than provide an invalid value.

Step 3: 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 that it's no longer listed on the Diagnostics page.

    Bear in mind: It may take some time for your change to be reflected on the Diagnostics page.

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