If you enter a 12-digit UPC but select GTIN from the Product ID Type it will provide an error. If you select UPC instead of GTIN, the error goes away.
Here’s a quick Identifier cheat sheet:
- GTIN = 14-digit number
- EAN = 13-digit number
- UPC = 12-digit number
Possible Duplicate Listing
A product, no matter who is selling it, may only have one GTIN (GTIN-14/UPC/EAN). If you are not the Brand Owner of the product, and the product is already available on Amazon, they might be blocking you from adding your own GTIN to identify a product that is already live in their marketplace.
If the brand owner has allocated a GTIN for the product but it is not yet in the Amazon catalogue, the seller may temporarily have an ASIN allocated to the product, however, if the brand owner comes to Amazon and establishes their ownership of the brand (through Brand Registry), the listing will likely be closed or allocated to the brand and the duplicate ASIN will be merged.
If you are not the brand owner and the brand owner has not allocated a GTIN for the product, but another seller has allocated a GTIN and established a listing before you (using other attributes of the product), Amazon will detect the ASIN and prevent a duplicate listing from being created. In this case, your GTIN is not being rejected, but rather Amazon is blocking you from creating a duplicate listing.
Did you get your barcodes today?
If you just got your barcodes today and you’re trying to use them on Amazon immediately, you might be experiencing an error because our databases need more time to sync. Amazon pings your information off our Database (GEPIR) to validate your barcodes. Sometimes we need a little extra time for everything to update between our databases. This is usually resolved within 2-3 business days. If you need to resolve this immediately, you can login to myGS1 US and download your GS1 Company Prefix Certificate or your GS1 US GTIN Certificate and provide it to an Amazon Marketplace employee to resolve the issue manually.