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processingInformation. authorizationOptions. initiator. merchantInitiatedTransaction. previousTransactionID {#processing-info-auth-ops-initiator-mit-txn}
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Network transaction identifier that was returned for a previous authorization in the series.  
This field is available only on the `FDC Compass`, `FDI Australia`, and `Visa Platform Connect` processors.  
The value for this field was returned in the processorInformation.transactionID field in the response message for either the original authorization in the series or the previous authorization in the series.

`FDI Australia`
:
This field is supported only for installment payments and merchant-initiated transactions.

Specifications {#processing-info-auth-ops-initiator-mit-txn_Specifications}
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* **Data Type:** String
* **Data Length:**
  * 29 (Discover and Diners Club)
  * 15 (All other card types)

Mapping Information {#processing-info-auth-ops-initiator-mit-txn_Mapping}
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* **REST API Field:** processingInformation.authorizationOptions. initiator.merchantInitiatedTransaction.previousTransactionID
* **SCMP API Field:** subsequent_auth_transaction_id
* **Simple Order API Field:** subsequentAuthTransactionID  
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