POS machines such as MasterCard Most of them issue US dollar or Japanese yen cards, so they are called foreign cards or foreign cards, or foreign cards for short. Because the authorization mechanism and risk handling mechanism of foreign cards are obviously different from those of UnionPay cards, the risk is much greater for domestic merchants. The fake card risk of foreign cards is the biggest risk. Due to the time difference in the settlement of foreign cards, once the real card holder encounters a fake card and freezes the card, the merchant is almost equal to a net loss. Merchants not only can't receive money, but also bear the losses brought to card issuers. For businesses that really need wild card POS machines, the following materials need to be prepared to apply for wild card POS machines: 1. Business license. Organization code certificate 3. Tax registration certificate. Bank account opening permit. Identity card of the legal representative.