Table shows values for threeDSecured : Type of transaction's 3DS authenticationAPI SOAP Value API Description Y Yes 3DS Transaction and liability shift applies N No Non-3DS Transaction : either merchant did not initiate any authentication or authentication was refused by the ACS or the authorization was refused. D Downgraded Merchant initiated 3DS authentication but according to scheme's rules liability shift doesn't apply (refer to 3D-Secure - Liability shift) or authorization server did not granted liability shift (Version 14 or higher)