TABLE OF CONTENTS


About UPC Matching 


When multiple sellers sell the same product on Amazon using the same UPC, Amazon .


To prevent the same product being sold multiple times Amazon uses product matching to find and eliminate duplicate listings.


The creation of product detail pages is limited to products that do not already exist within Amazon's catalogue. Creating a product detail page for a product already in the Amazon catalogue is prohibited.


Creating a listing for products already in the Amazon Catalogue


Valid UPCs

Amazon verify the authenticity of product UPCs by checking the GS1 database. UPCs that do not match the information provided by GS1 are considered invalid by Amazon. 


https://sellercentral.amazon.com.au/gp/help/external/200390640?language=en_AU&ref=efph_200390640_cont_200317470



If the product that you are listing has been confirmed to have no known UPC, EAN, ISBN, ASIN, or JAN code and if you are listing a unique selection, you can request a brand or SKU-level UPC exemption. 


Visit How to list products that do not have a GTIN for eligibility information.


You can check GTIN existence here https://www.gs1.org/services/verified-by-gs1