You mean CVV? CVV is an anti-fraud security feature to help verify that you are in possession of your credit card. For Visa/Mastercard, the three-digit CVV number is. Is it possible to add my Maestro debit card without a CSC code? My bank account is enabled to pay online, but my credit card doesn't have. Alternativ zum Card Verification Value (CVV) sind auch die Sicherheitsschlüssel Card Validation Code (CVC), Card Security Code (CSC) oder Card Code.