Is It Illegal To Sell Designer Dupes When it comes to selling designer dupes, the legality of this practice can be a gray area. While selling replicas of designer products is not illegal per se, it can become illegal if the replicas are being sold as authentic goods. According to the FBI, counterfeiting is a criminal industry that involves the manufacturing and selling of fake goods, often in violation of trademark or copyright laws. It is important to note that selling designer dupes can also violate intellectual property rights. The U.S. Copyright Office defines intellectual property as creations of the