ThreeDSRequestorPriorAuthenticationInfoXML

The ThreeDSRequestorPriorAuthenticationInfoXML tags and data validation rules are described in the following table. The XML tags should follow the order they are listed.

**ThreeDSRequestorPriorAuthenticationInfoXML Field Description Table**
Name	Description	Mandatory	Valid Characters	Max Length	Allowed Values
threeDSRequestorPriorAuthenticationInfo	The root element for all other threeDSRequestorPriorAuthenticationInfo elements.	No	Node
threeDSReqPriorAuthData	Data that documents and supports a specific authentication process. In the current version of the EMVCo specification, this data element is not yet defined.	No	Any	2048 bytes
threeDSReqPriorAuthMethod	Mechanism used by the cardholder during a previous 3DS authentication, as part of a previous transaction request. Valid values are: 01 = Frictionless authentication occurred by ACS 02 = Cardholder challenge occurred by ACS 03 = AVS verified 04 = Other issuer methods 05–79 = Reserved for EMVCo future use (values invalid until defined by EMVCo) 80–99 = Reserved for DS use	No	Digits from 01 to 99	2	01 02 03 04
threeDSReqPriorAuthTimestamp	Date and time in UTC of the previous cardholder 3DS authentication.	No	ISO8601	16	Date and time as: yyyy-MM-ddTHH:mm yyyy - Year MM - Month dd- Day T - Time separator HH - Hour mm- Minute
threeDSReqPriorRef	This data element provides additional information to the ACS to determine the best approach for handling a request. It will contain an ACS Transaction ID for a prior authenticated transaction. For example, the first recurring transaction that was authenticated with the cardholder. This will be returned in future in a field name called ACSTransID.	No	Letters, digits, hyphens, and curly brackets	36