If you are an Amazon seller or brand who owns a product ID and find that your registered product ID has been incorrectly assigned or used fraudulently by another seller to sell a different product, follow the steps below to request that the Product ID be released from the incorrect ASIN so that it can be used to sell the product you have assigned it to.
How to Change a Product ID, UPC or EAN of an Existing Listing or ASIN on Amazon.com
Accurate Product ID assignment in the Amazon marketplace is critically important. Inaccurate product ID assignment can lead to issues related to fulfillment and merchandising (product detail page display). If a product has been set up with an inaccurate Product ID, follow the steps below to request that the Product ID assignment is updated.