https://community.developer.cybersource.com/t5/Integration-and-Testing/What-s-a-LineItem-s-ItemId-meant-to-represent/m-p/72524#M44799 <P>It is a merchant defined field, you can add what you like there. Typically it would be a product identifier, like a UPC.</P> Thu, 16 Jul 2020 18:29:40 GMT mmcguire 2020-07-16T18:29:40Z https://community.developer.cybersource.com/t5/Integration-and-Testing/What-s-a-LineItem-s-ItemId-meant-to-represent/m-p/72431#M44738 <P>They're required, but there's no info on what they represent or who uses them and for what. Do they have to be unique within the specified transaction?</P> Tue, 07 Jul 2020 14:44:05 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/What-s-a-LineItem-s-ItemId-meant-to-represent/m-p/72431#M44738 chickenngiblets 2020-07-07T14:44:05Z https://community.developer.cybersource.com/t5/Integration-and-Testing/What-s-a-LineItem-s-ItemId-meant-to-represent/m-p/72524#M44799 <P>It is a merchant defined field, you can add what you like there. Typically it would be a product identifier, like a UPC.</P> Thu, 16 Jul 2020 18:29:40 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/What-s-a-LineItem-s-ItemId-meant-to-represent/m-p/72524#M44799 mmcguire 2020-07-16T18:29:40Z