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Why does China Merchants Bank always make mistakes when entering the last three digits of a credit card?
There are always two sets of numbers behind the credit card, one is the last four digits of the card number, and the other is three digits at the end of the signature column. After signing the column, please confirm whether there is any mistake. You are usually asked to enter a separate three-digit part. If not, you'd better call the Credit Card Center of China Merchants Bank to ask.