A Prada Milano authenticity certificate card is the card included with an authentic Prada handbag that provides the bag's control number, which is found inside the bag. Any discrepancy between the control numbers on the authenticity card and the bag indicates the bag is not authentic Prada.
A Prada authenticity certificate card is made of plastic and is about the size of a credit card. A genuine Prada bag will include an authenticity card. The front of the card has the Prada logo and reads "Authenticity Certificate Card" in both Italian and English. The backside of the card features the control number, color and material information.