FLUF / THE SELLER REFERENCE
GTIN meaning: GTIN, UPC, EAN, SKU and barcode differences
Global Trade Item Number: a standardised identifier for a trade item, used to recognise the same product across businesses.
What do UPC and EAN mean?
GTIN is the identifier family. GTIN-12 is commonly called UPC, while GTIN-13 is commonly called EAN. The barcode symbol is how an identifier can be represented for scanning. Treat the identifier as text when storing it so that formatting does not alter its digits.
A product example
A manufacturer sells the same ceramic mug through two retailers. Each retailer can choose its own internal SKU, but the manufacturer’s identifier for that exact product is shared. A differently packaged multipack or another variant may have a different identifier. Do not borrow a number from a product that merely looks similar.
GTIN versus SKU versus serial number
Your SKU organises your own catalogue. The GTIN helps identify a trade item across businesses. A serial number identifies one particular physical unit, such as an individual camera. Selling a used camera does not make its serial number the product’s GTIN, and entering your warehouse code in the barcode field does not turn it into a standard identifier.
Where should a seller look?
Check the product packaging and reliable manufacturer information for the exact item. Verify the model, variant and pack size rather than relying on a search result with a similar title. When the original code is missing, follow the destination marketplace’s rules for that category instead of inventing one. Requirements and exemption processes differ.
Does a barcode prove authenticity?
No. A readable or valid-looking identifier is not proof that the physical item is genuine. Inspect the item and its provenance separately. Likewise, a product identifier is not a description of its present condition: two units with the same identifier can have very different wear or missing accessories.
Put it into practice
Explore related product and stock guidance. For selling across marketplaces, see FLUF Connect crosslisting and current plans and pricing.
Related terms
Reference
Primary reference: GS1. The examples on this page are illustrative, not customer results or universal benchmarks.
