If you use the same machine for a long time, you will be blocked. If your credit card is always swiped at the same POS machine, it will be easily regarded as cashing out by the bank. If you swipe the card too many times on the same machine, you will be concerned. Always pay at the same company, and if the amount is relatively large or fixed. Credit cards and POS machines may be blocked.

Extended information:

1. The reasons for credit card suspension are as follows:

1. Suspicion of cashing out leads to freezing;

2. Multiple overdue repayments;

3. Second-clearance POS machine codes and code hopping: There are currently a proliferation of second-clearance POS machines on the market. Due to some of them using the large merchant model, credit card consumption records are chaotic. status.

For example, if Zhang San lives in Beijing and makes a transaction of 100 yuan in a certain store, the bank registration information of the Erqing POS machine used by the other party may be in another city. Once Zhang San makes purchases at the Erqing POS machines in other merchant classes on the same day, and encounters a similar situation, there will be records of credit card swiping in several different cities in one day, and it is very easy to be monitored and seized by the bank.

2. Credit card security issues

Because credit cards are convenient and fast to use, and coupled with the rapid development of science and technology, credit cards are facing security issues due to the mechanism of consumption first and payment later

The problem is becoming increasingly serious, and major international credit card groups and global card-issuing financial institutions are facing severe challenges. The security issues of credit cards are mainly divided into the following five aspects:

Credit cards: Criminals or criminal groups use fake or invalid cards (expired/lost and invalid/tape damaged...etc.) to pretend to be genuine cards for consumption. Directly deceiving merchants or card issuers.

Cardholders: Poor storage/handling of cards (expired/invalid credit cards are not destroyed, or lost cards are not immediately invalidated, etc.), and personal identity information is unintentionally stolen or defrauded. To avoid such problems, citizens should not easily provide personal identity information to others, and it is best not to entrust others to handle credit cards on their behalf.

Consumer merchants: Service staff overcharge cardholders during their consumption process, or steal their credit card information to make purchases at other merchants. This situation can happen whether it is a physical merchant or an online virtual merchant.

Card issuer: The computer system was maliciously invaded and the customer's basic/transaction information was stolen. There are also cases where employees within the organization commit crimes such as self-inflicted theft or internal supernatural powers and external ghosts.

Trading system and mechanism: As long as it is made or handled by humans, human errors and oversights are inevitable; no matter how rigorous the trading mechanism is, with a world-class trading system from confirmation to settlement, there will still be mistakes. The possibility of invasion, and the so-called "invasion" actually has hierarchical differences.

People's Daily Online - Gray industrial chain for cashing out credit cards: Use POS machines to swipe cards to develop offline and earn points

Baidu Encyclopedia - Credit Cards