Are you talking about the security code of your credit card? You can inquire by credit card or by phone.

1. Credit card inquiry: Take out the credit card directly and check the security code at the back. However, if the credit card is not around, or is lost, or the cardholder has cut out the complete code, through this The method is definitely not found, so we need to use the second method.

2. Telephone inquiry: Use the reserved mobile phone number to call the credit card service hotline of the card issuer, follow the voice reminder to connect to the manual customer service, and ask the customer service to check the safety code. The customer service may help you after verifying your identity. Query.