Hello, if this happens when you use our credit card, I suggest that you change the machine before operation, and do not rule out the abnormality of the machine (use the transaction password when swiping the card or borrowing cash in advance). If you have any other questions, it is suggested to add "QQ" or "WeChat" to experience the function of the "micro-customer service" platform of the credit card, or telephone manual service consultation. Method 1: Search for "4008205555" among QQ corporate friends and add "China Merchants Bank Credit Card Center" as a friend; Or WeChat search for "cmb4008205555" and pay attention to China Merchants Bank Credit Card Center. Method 2: Please call the credit card customer service hotline 8008205555 (fixed telephone only) or 4008205555. The cardholder should directly enter the ID number and inquiry password-then select "9" to enter the manual service. Thank you for your attention and support!