Google Merchant Center identifier_exists Attribute: When to Use True or False
Summary
identifier_exists tells Google whether a product has standard identifiers. When set incorrectly, it causes either missing-identifier errors or a 'you have filled out a field incorrectly' message. Most sellers get this wrong by not matching the attribute to their actual product data.
Quick Answer
Set identifier_exists to true if your product has a GTIN (barcode), brand name, or manufacturer part number. Set it to false only if the product genuinely has none of these. Either way, you still need to provide the identifiers you actually have. Getting this wrong causes feed errors even when the rest of your product data is correct.
What This Issue Means
identifier_exists is a conditional attribute that tells Google whether to expect a GTIN, brand, and MPN for a product. It does not mean the identifiers are 'required' — it means they 'exist' for this product. Google then uses the identifier data itself to validate the listing. If the identifiers are present but identifier_exists is absent or false, Google may show a 'you have filled out a field incorrectly' error. If the identifiers are genuinely absent but identifier_exists is true, Google will flag the missing identifiers.
Why It Happens
- Product has a GTIN or brand but identifier_exists was not set to true
- Product genuinely has no standard identifiers but identifier_exists was left at default or set to true
- Shopify or feed app sets identifier_exists automatically and overrides manual settings
- GTIN was removed from the feed but identifier_exists still expects identifiers
- identifier_exists is set to false but brand or MPN was also not provided — Google requires at least brand when GTIN is absent
- Custom or bundle products with no standard identifiers but no documentation to show this
- Feed app uses a default identifier_exists value that does not match all products in the feed
- Brand name was removed from the feed but identifier_exists still refers to having a brand
What to Check First
- Check Merchant Center diagnostics to confirm which products are flagged for identifier_exists issues
- Determine whether each flagged product has a real GTIN (barcode) on the physical item or packaging
- Check whether the brand name is present and recognized by the manufacturer
- Locate the manufacturer part number (MPN) on the product, packaging, or supplier documentation
- Review your Shopify feed app or CSV feed settings to see how identifier_exists is mapped
- If the product truly has no GTIN, confirm brand and MPN are still provided in the feed
- If the product has a GTIN, set identifier_exists to true and verify the GTIN is correct
- Preview the feed output to confirm identifier_exists matches the actual identifier data
- If using Shopify, check whether the Google & YouTube channel or third-party app is overwriting identifier_exists
Evidence to Prepare
- Photo of the product barcode clearly showing the GTIN number
- Supplier or manufacturer invoice listing the product's GTIN, brand, and MPN
- Screenshot of Merchant Center diagnostics showing the identifier_exists error for specific products
- Feed export or preview showing the current identifier_exists and GTIN/brand/MPN values
- Shopify product metafields screenshot showing GTIN, brand, and MPN configuration
Step-by-Step Recovery Path
- Identify which products triggered the identifier_exists error and whether they have real identifiers
- For products with GTINs: locate the actual barcode number from the physical product
- For products without GTINs: confirm the product type (custom-made, bundle, raw material) and prepare documentation
- Set identifier_exists to true for products that have GTIN, brand, or MPN
- Set identifier_exists to false only for products that genuinely have no standard identifiers
- Even with identifier_exists set to false, provide brand and MPN if available
- Update the feed in Shopify, feed app, or CSV, then preview the output before submitting
- Resubmit the product feed in Merchant Center and request re-review for affected products
- Monitor the diagnostics tab for any remaining errors after resubmission
Mistakes to Avoid
- Setting identifier_exists to false for a product that actually has a valid GTIN — this triggers the 'filled out a field incorrectly' error
- Making up a GTIN for a product that does not have one — this causes an invalid GTIN error and may trigger a policy violation
- Leaving identifier_exists at its default value without checking whether it matches the product — default behavior varies by feed app and product category
- Not checking whether the Shopify feed app or third-party integration is automatically overwriting the identifier_exists setting
- Removing a GTIN from the feed but leaving identifier_exists set to true, which causes a mismatch
- Setting identifier_exists to false and then also omitting the brand and MPN — Google requires at least the brand name when GTIN is absent
When to Ask an Expert
Consider reaching out to an expert if:
- The product has no standard identifiers and you are unsure whether identifier_exists should be set to false
- Your GTIN keeps failing validation even though the barcode number is correct
- A Shopify or feed app keeps overwriting your identifier_exists setting and you cannot control it
- You need to register a brand in Google's brand registry before identifiers can be accepted
- You have a large catalog with mixed identifier requirements and need systematic feed configuration
Related Issues
Missing Product Identifiers in Google Merchant Center: GTIN, MPN, and Brand Checklist
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.
Limited Performance Due to Missing Identifiers: What Google Merchant Center Sellers Should Fix
Products without complete identifiers appear less frequently and in lower ad positions. Add your GTIN (from the product barcode), brand name, and MPN to your feed to restore full matching and improve performance.
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.
Frequently Asked Questions
What does identifier_exists mean in Google Merchant Center?
identifier_exists tells Google whether a product has standard product identifiers — specifically a GTIN, a brand name, or a manufacturer part number (MPN). It is a yes/no flag that helps Google determine whether to validate those identifier fields. If identifier_exists is true, Google expects to find valid identifier data. If it is false, Google does not require identifiers but still expects the brand if no GTIN is provided.
Should identifier_exists be true or false?
Set it to true if your product has a GTIN (barcode), a brand name, or an MPN. Set it to false only if the product genuinely has none of these identifiers — for example, custom-made items, handmade goods, or products sold without manufacturer packaging. Do not set it to false just because you do not want to deal with identifiers. Getting this wrong causes errors on both sides.
Why does Google Merchant Center say I filled out a field incorrectly?
This error often appears when identifier data is present in the feed but identifier_exists is set incorrectly. For example, if a GTIN is listed but identifier_exists is false, or if the GTIN or brand field has an invalid format. Review the specific field mentioned in the error and cross-check it against your identifier_exists setting.
How is identifier_exists related to GTIN, MPN, and brand?
identifier_exists acts as a gate: it tells Google whether to look for these three identifiers. If the gate is open (true), Google expects to find accurate data in the GTIN, brand, and MPN fields. If the gate is closed (false), Google does not require them — but you still need to provide the brand if no GTIN is present. The identifiers themselves must still be valid even when identifier_exists is false.
What should Shopify sellers check when identifier_exists causes feed errors?
Shopify sellers should check two things. First, verify that the GTIN, brand, and MPN metafields are populated for each product. Second, check how the Google & YouTube channel or your third-party feed app maps the identifier_exists attribute — some apps set this automatically based on their own rules and may override manual settings. Export the feed and review the identifier_exists value for each flagged product to find the mismatch.
Independent Disclaimer
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