The gtin must be provided if the product has a Global Trade Item Number (GTIN).  It is used to ensure accurate matching of Feefo reviews to products when submitting to Google’s product rating programme. 

Supported values are:

UPC (in North America/GTIN-12) 

  • 12-digit number e.g. 323456789012
  • 8-digit UPC-E codes should be converted to 12-digit codes

EAN (in Europe/GTIN-13)

  • 13-digit number e.g. 3001234567892

JAN (in Japan/GTIN-13)

  • 8 or 13-digit number e.g. 49123456 or 4901234567894

ISBN (for books)

  • 10 or 13-digit number e.g. 1455582344 or 978-1455582341. If you have both, only include the 13-digit number. ISBN-10 are deprecated and should be converted to ISBN-13

ITF-14 (for multipacks/GTIN-14)

  • 14-digit number like 10856435001702 property

  • Product.isbn
  • Product.gtin8
  • Product.gtin12
  • Product.gtin13
  • Product.gtin14