The supplementary confirmation of the card means that the user's transaction information in the bank is not displayed on the bank card, but stored in the online computer system, which needs the user's own confirmation. In other words, the transaction information of the user's previous bank card is printed, but this information is not displayed on the user's bank card and needs to be confirmed by the user.

Bank card supplementary information is a security measure for banks to open, which can improve personal information, prevent bank cards from being stolen and ensure the safety of card use.