Encountering a GTIN error on Amazon Seller Central can immediately halt your product launch. Here is a clear breakdown of why Errors 5665, 8572, and 8556 occur and how to fix them step by step.
1. Amazon Error 5665: Brand Name Not Registered
Error 5665 occurs when you enter an unapproved Brand Name in the listing form. Amazon requires proof that you own or manufacture products under that brand string before allowing listing creation.
How to fix: Submit real photos of your physical product or packaging showing your Brand Name permanently affixed to the item. Alternatively, select 'Generic' if you do not have a registered brand name yet.
2. Amazon Error 8572: GTIN / Barcode Mismatch
Error 8572 occurs when Amazon's system flags a mismatch between the GTIN entered and the Brand Name provided on the listing form.
How to fix: Ensure you are listing using clean, pre-validated UPC-A codes from legitimate pre-2002 legacy UCC company prefixes. If you are enrolled in Amazon Brand Registry, Amazon expects strict prefix ownership matching; otherwise, standard third-party codes create listings seamlessly.
3. Amazon Error 8556: Invalid GTIN Checksum
Error 8556 triggers when the 12th digit (check digit) of a UPC code does not match the mathematical checksum calculated from the preceding 11 digits.
How to fix: Use UPCBay's free Check Digit Calculator to recalculate the exact 12th digit. All codes supplied by UPCBay are 100% pre-validated against checksum errors.