Gateway-generated transaction identifier returned in the response of the original transaction. This indicates the transaction from which card data will be reused.
This is important in cases where the client processes a large number of similar transactions in a very short period of time; sending "Y" will skip duplicate checking on this transaction
<xs:complexTypename="OverrideFraudDeclineReqBlock1Type"xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:all><xs:elementname="GatewayTxnId"type="txnIdType"minOccurs="0"><xs:annotation><xs:documentation><pxmlns="http://Hps.Exchange.PosGateway">Gateway-generated transaction identifier returned in the response of the original transaction. This indicates the transaction from which card data will be reused.</p></xs:documentation></xs:annotation></xs:element><xs:elementname="AllowDup"type="booleanType"minOccurs="0"><xs:annotation><xs:documentation><pxmlns="http://Hps.Exchange.PosGateway">This is important in cases where the client processes a large number of similar transactions in a very short period of time; sending "Y" will skip duplicate checking on this transaction</p></xs:documentation></xs:annotation></xs:element></xs:all></xs:complexType>