The reasons why credit cards cannot be swiped on POS machines can be summarized as follows: \x0d\ 1. The card is degaussed, and the detection method should be detected in other regular supermarkets, not in TX machines; \x0d\ \x0d\ 2。 UnionPay automatically identifies risky transactions, that is, cash transactions. For example, if you make multiple transactions on this machine (referring to unknown merchants or large supermarkets, which usually appear at ATMs), the UnionPay system will automatically withdraw cash and pay if it is suspected to be cash. \x0d\ \x0d\ 3。 Individuals set online banking or transaction restrictions. \x0d\ \x0d\ Of course, in an emergency, if you are not sure why the credit card cannot be swiped, Kabo. Com thinks that the most useful method at this time is to call the customer service phone of the credit card issuing bank in time, ask the customer service staff about the reasons and solutions, and freeze the credit card at the critical time to avoid property losses.