When I input my credit card from the Internet with China Construction Bank Credit Card and input it, the account number does not exist.

When I input my credit card from the Internet with China Construction Bank Credit Card and input it, it says that the account number does not exist. There are generally 3 reasons, as follows.

(1) Input error, please check the bank and re-enter (credit card is 16 digits, debit card is 19 digits).

(2) The wrong card type is selected, for example, it is a credit card but a debit card is selected.

(3) The card has been canceled/reported as lost, and the bank will prompt that it does not exist.

Based on the above 3 reasons, use the elimination method to actually determine the real problem.

Extended information:

Notes on credit cards:

Because credit cards are convenient and fast to use, and coupled with the rapid development of science and technology, credit cards require consumption first and payment later. Mechanisms are facing increasingly serious security issues, 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 some unscrupulous things such as internal employees of the organization who commit theft or possess supernatural powers.

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.