1. The credit line of China Merchants Bank is insufficient and has been used up. After repayment is required, it cannot be used again before the credit line is restored;
2. A single transaction of China Merchants Bank's credit card, the transaction amount in one day or a certain transaction channel is limited, and it needs to be split into multiple transactions or the next day's transactions, or it needs to be traded through different merchants or POS machines;
3. Bank risk control, the credit card limit is frozen, and you need to contact the bank to apply for unfreezing.
The transaction volume of extended data merchants is too large, and the system automatically refuses. For example, in a slightly larger hotel, there are about 100 normal transactions a day, including 20 cash transactions, 20 debit card transactions, 40 WeChat Alipay transactions and 20 credit card transactions. Credit card 20 transactions should not only have one credit card from China Merchants Bank, but also from other banks. A prompt will appear when the credit card transaction of China Merchants Bank is greater than the number of merchant transactions identified by the system.
Hand-brushed transactions on the machine. Hand brushing machine is not recommended. The newly released hand-brush machine has a serious code jump, one in China, the other in Beijing and the other in Shanghai. Four of the five transactions were in different cities. The hand brush machine is unstable, so it is recommended to use it less or not.
Baidu Encyclopedia-Credit Card Overlimit Fee