We import items from china. We then put our UPC code which is registered and legitmate on them and we sell them under our corporate name on amazon.com. In order to list on amazon you must have a upc code. Other sellers who have a similar product attach to our listing. in order to do this amazon.com gives them our upc code and the listing appears to be by the manufacture of our corporation. Is the use of our upc code a copyright violation? if so who is at fault, amazon.com or the listing company? The problem is today with smart phones, someone can put in our upc code and then see the products being sold by other sellers that may not have come from us.