Credit cards can't be used even if they have money. The possible reasons are as follows:
1) Card swiping is restricted. If your credit card is clearly limited, but you can't swipe it, then it may be that your credit card is restricted. For example, if you set a daily limit for your credit card, you can't swipe your card in the future even if there is still a limit in your card when your consumption has reached the limit that day. Or if you swipe your card too frequently in a day, it will also be restricted, resulting in a limit in the card but you can't swipe your card.
2) The card is frozen. If your card is abnormal, such as being frozen by the bank, even if your card has a limit, you can't swipe it.
3) Wrong password. For example, when we use a credit card to spend money, we often need a transaction password. If you enter the wrong transaction password, the card will not be able to pay for the transaction, so there will be cases where the card has a limit but cannot swipe the card.
There is something wrong with the POS machine. If your card clearly has a limit but you can't swipe it, it may be that the POS machine of the merchant is out of order, so you can't swipe it.
5) Card damage If you want to use a credit card for transactions, the magnetic stripe on the card is very important. If the magnetic stripe on the credit card is damaged, you can't swipe your card.
6) The transaction is risky. If your credit card transaction is suspected to be risky by the bank, the bank will not let you successfully conduct the transaction in order to avoid the risk. For example, some people use the card improperly, which leads the bank to suspect that you are cashing in when you trade, so you can't trade, which leads to that you can't swipe your card when you know there is a limit in your card.
Credit card is a kind of bank card, which is called debit card in the industry. With overdraft consumption, enjoy a certain period of interest-free period. To put it bluntly, credit card is a simple loan service provided by banks to customers. Customers can use credit cards to overdraw their consumption first and then repay them.