The use of credit cards will be subject to risk monitoring by banks. If they are used improperly, the status of credit cards may be abnormal, which will affect the normal use of credit cards, and even more seriously, the cards may be directly blocked. The following conditions will lead to abnormal credit card status: 1 There is a risk of stolen credit card. When the transaction situation of your credit card is risky, it is likely that the bank will determine that the card has been stolen, so it will display an abnormality when swiping the card. The most common thing is to suddenly brush a large amount, and the bank will call to verify whether it is my consumption. There are many cases in which the sub-control of Bank of Communications is strict. 2 Frozen or loss reporting status If the credit card is frozen by the bank due to improper use, or if the card is currently in loss reporting status, it will show abnormal status and need to call customer service to unfreeze it. 3 Cancellation or degaussing If the card has been cancelled, it will show that the card status is abnormal when it is swiped again; There is also a magnetic stripe card that has been degaussed due to too many times of use, so it can't be brushed. 4 Limit limit The limit of a credit card is not only limited by the limit, but also limited by a single transaction per day. Exceeding this limit will also lead to unsuccessful credit card swiping, prompting that the card status is abnormal. 5 In the risk control of the suspected bank, your card usage will be monitored all the time. If you have frequent large transactions, and they are integers every time, it will trigger the bank's risk control bottom line and it is suspected of cashing out. 6 Three Wrong Passwords If you enter the wrong password for more than three times on the same day, the credit card will be locked and cannot be traded. If you swipe your card again, you will be prompted to be abnormal.