A Global Trade Item Number® (GTIN®) is typically found at point of sale (encoded in the U.P.C. barcode), but it can also be found on cases and pallets of products in a distribution or warehouse environment.
It's important to use the right GTIN for the right situation. Individual products will need different GTINs than a case or a pallet. Mislabeling products will cost you time and money, and it will definitely frustrate your trading partners. Mastering GTIN use is an integral part of a happy, healthy, and wealthy supply chain.