payerAuthValidateReply_acsTransactionID {#payer-auth-validate-reply-acs-transaction-id}
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Unique transaction identifier assigned by the access control server (ACS) to identify a single transaction.  
When you request the payer authentication and authorization services separately, get the value for this field from the payerAuthEnrollReply_acsTransactionID or payerAuthValidateReply_acsTransactionID response field.

Specifications {#payer-auth-validate-reply-acs-transaction-id_d668e31}
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* **Data Type:** String
* **Data Length:** 36

Mapping Information {#payer-auth-validate-reply-acs-transaction-id_d668e50}
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* **REST API Field:** consumerAuthenticationInformation. acsTransactionId
* **SCMP API Fields:**
  * acs_server_transaction_id
  * pa_acs_transaction_id
* **Simple Order API Fields:**
  * ccAuthService_acsServerTransactionID
  * payerAuthEnrollReply_acsTransactionID
* payerAuthValidateReply_acsTransactionID