OEM code is a label sewn on the side of Prada handbag lining. For example, the famous killer bag is in the small zipper pocket. The wallet is stamped, not a sewing mark.

Overseas European and American OEM code wallets generally have 42D62C 107A, and large bags generally have 56 and 5 pairs of white labels. Now, an anti-counterfeiting line is added on the basis of the white label, and a chip scanning NFC is added in the bag.