The main cardholder can set or cancel the credit card verification password function in the following ways (the main cardholder can set this function for the secondary card). 1. Online Settings: log in to the Internet Banking Popular Edition/Professional Edition, and click Card Management-Transaction Password Management-Credit Card Password Function Enable. Please click:/cmbbank _ genshell/ui/genshellpc/login/login.aspx? Log on to online banking II. Telephone setting: dial the credit card customer service hotline to verify your identity, and then press 3 to enter "transaction password setting and modification".