Many credit card companies require the Card Verification Value (CVV code) to process payments:
1.Open the Registry from the Desktop.
2.Navigate to the Registry::EN::Business Objects::TSpaymentMethodBO::Payment Types::Credit Card::CVV code node
3.Select No from the 'Optional' dropdown.
4.Click 'Apply'.
The CVV code is now required for all users (including Desktop) when credit card payments are made.