Missing required identifier (GTIN or MPN)

Meta needs at least one product identifier — a GTIN, MPN, or both — to verify your product. Without one, the listing is blocked from Facebook and Instagram Shops.

Your feed didn't supply gtin or mpn. Meta is more permissive than Google here (either is acceptable), but at least one must be present and valid.

1. Add a GTIN if the product has a manufactured barcode. UPC, EAN, ISBN all qualify.
2. If no GTIN exists, add an MPN — the manufacturer's part number — plus a brand. Meta accepts MPN+brand as a valid identifier pair.
3. For private-label or handmade goods with neither, Meta is stricter than Google: you'll need to add the brand attribute and may need to verify your domain to keep the products eligible.
4. Resubmit the catalog and wait 4–24 hours for Meta to revalidate.

• Submitting your internal SKU as the MPN — it must be the manufacturer's, not yours
• Missing the brand attribute, which is required when using MPN as the identifier