Cardholder Authentication Verification Value.
This property is determined by the Access Control Server (ACS), and is filled after receiving a response to a Payer Authentication Request (PAReq). This property contains a 28-byte Base-64 encoded Cardholder Authentication Verification Value (CAVV). The data contained within this property is only valid if the AuthenticationStatus is "Y", or if a proof of authentication attempt was generated (AuthenticationStatus is "A").
Some regions may require that this value be included in the VIP authorization message.
Note: When using American Express SafeKey, this value may be referred to as the American Express Verification Value (AEVV).
This property is read-only and not available at design time.