1. No password: Many people do not choose to sign transactions when applying for credit cards, so they must set passwords when activating credit cards, including inquiry passwords and transaction passwords. In addition, the cardholder must enter the correct transaction password when using the credit card to spend or withdraw cash, otherwise the transaction will not succeed.
2. Overlimit credit card transaction: Generally, newly activated credit cards cannot exceed the limit, and only the bank credit limit can be swiped at most. Many people think that credit cards can be overdrawn, so they buy goods that exceed the available quota, but the transaction fails due to insufficient quota.
3. Consumption of credit cards in the blacklist of merchants: Each credit card application platform has a blacklist of merchants, which contains many inferior and false merchants. If the merchants brushed by card friends are blacklisted, they are likely to be restricted from trading. At this point, even if the card amount is sufficient and the status is normal, the card cannot be swiped successfully.
4. Credit card damage: Many people put their credit cards in their pockets after activating them, and their credit cards were accidentally damaged. At this time, the credit card has been damaged and cannot be used normally. If you need to use it, you should report the loss first and then add a new card before activating it.