SellerFixHub
Google Merchant Center/Updated 2026-05-28

Missing Product Identifiers in Google Merchant Center: GTIN, MPN, and Brand Checklist

Summary

Missing product identifiers means Google requires a valid GTIN, brand, and MPN for your product but one or more of these attributes is absent or invalid. This is a common feed quality issue that prevents products from being approved.

Quick Answer

Add the missing GTIN, brand, and MPN to your product feed. GTINs must match the actual product barcode. If your product genuinely does not have a GTIN, set identifier_exists to no and provide brand and MPN instead.

What This Issue Means

Google requires unique product identifiers for most products to ensure accurate product matching. Without valid GTIN, brand, and MPN information, Google cannot verify your product data and will disapprove the listing.

Why It Happens

  • GTIN field is empty when the product has a valid barcode
  • Brand name is missing or too generic (e.g., 'Generic' or 'N/A')
  • MPN field is empty for products that have manufacturer part numbers
  • GTIN is entered incorrectly (wrong digit, typographical error)
  • GTIN belongs to a different product or supplier
  • Product does not have a standard GTIN and identifier_exists was not set to no
  • Brand is listed but not a registered or recognized brand in Google's database
  • Both GTIN and MPN are missing without setting identifier_exists

What to Check First

  • Check which specific identifier is flagged as missing in Merchant Center
  • Locate the actual GTIN barcode on the physical product or packaging
  • Verify the brand name matches the product's official manufacturer brand
  • Find the MPN on the product, packaging, or manufacturer documentation
  • Confirm whether the product is custom-made (may not need standard identifiers)
  • Cross-check the GTIN with an online barcode database if validation keeps failing
  • Verify the GTIN length matches the correct format (EAN-13, UPC-A, etc.)

Evidence to Prepare

  • Photo of the product barcode showing the GTIN
  • Product packaging with brand name, GTIN, and MPN visible
  • Supplier invoice listing the product's GTIN, brand, and MPN
  • Screenshot of the current feed data showing which identifier fields are empty
  • Screenshot of corrected feed data after adding identifiers

Step-by-Step Recovery Path

  1. Identify which identifier is missing or invalid in Merchant Center
  2. For GTIN: locate the actual barcode on the product or packaging
  3. For brand: use the exact manufacturer brand name, not a marketplace alias
  4. For MPN: find the manufacturer part number on the product or documentation
  5. If the product has no standard GTIN, set identifier_exists to no and provide brand and MPN
  6. Update your product feed with the corrected identifier values
  7. Resubmit the product feed and wait for re-review

Mistakes to Avoid

  • Making up a GTIN rather than finding the actual product barcode
  • Using the supplier's brand name when you are not an authorized reseller
  • Entering a brand name that is not recognized in Google's brand registry
  • Leaving identifier_exists at its default while the GTIN is genuinely missing
  • Using a similar product's GTIN because the exact match was unavailable

When to Ask an Expert

Consider reaching out to an expert if:

  • Your GTIN keeps failing validation despite appearing correct
  • You are a reseller and are unsure which GTIN you are authorized to use
  • Your product has no standard identifiers and you need guidance on identifier_exists settings
  • You need to register a brand in Google's brand registry
Get expert help

Related Issues

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

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.

GTIN, MPN, and Brand in Google Merchant Center: What Sellers Should Check

GTIN is your product's barcode number (found on the packaging). Brand is the official manufacturer name. MPN is the manufacturer's part number. Use all three accurately and only for products you are authorized to sell.

Google Merchant Center Product Disapproved: Causes and Recovery Steps

A disapproved product means your listing does not meet Google's standards. Check the specific disapproval reason in Merchant Center, fix the issue in your feed, and resubmit the product.

Frequently Asked Questions

What if my product genuinely does not have a GTIN?
Products without standard GTINs (custom-made, bundles, raw materials) can still be listed. Set the gtin field to empty and set identifier_exists to no. Provide the brand and MPN instead.
Where can I verify if a GTIN is correct?
You can check GTIN validity on websites like gs1.org or barcode lookup tools. The GTIN must match the specific product you are selling, not a similar item from the same brand.
Can I use a brand name that is not registered in Google's database?
You can list your own brand, but Google may require brand verification over time. Using another company's trademarked brand name without authorization is a policy violation.
What is the difference between GTIN and MPN?
GTIN (Global Trade Item Number) is a unique product barcode that identifies a specific product at the retail level. MPN (Manufacturer Part Number) is a code assigned by the manufacturer to identify a specific version or variant of their product.

Independent Disclaimer

SellerFixHub is an independent educational and lead-matching resource. We are not affiliated with Google, TikTok, Amazon, Shopify, or any marketplace. We do not guarantee product approval, account reinstatement, appeal success, or review outcomes. Platform decisions are made by the platform.