Mastercard Transaction Link Identifier {#mc-issuer-info-txn-information}
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**Effective date:**June 4, 2024  
**Processor:** `Visa Platform Connect`  
**Regions:**All  
**Services:**

* Authorization response
* Authorization subsequent request
* Authorization reversal
* Authorization reversal response
* Credit response
* Follow-on credit authorization request  
  **Feature**  
  As of June 4, 2024, Mastercard is introducing the transaction link identifier. Mastercard generates a new transaction link identifier as a 22-character unique identifier and populates it in the first message in a transaction life-cycle. Mastercard generates a value and populates it in the response message if one was not previously assigned. For life-cycle transactions, Visa includes the value provided by the acquirer.  
  **Acquirers**  
  Acquirers must support this data in the TC 33 capture file:
* Record: CP12 TCR 4
* Position: 73-108
* Field: Transaction Link Identifier  
  **Merchants**  
  Merchants receive a transaction link identifier in this field for the first transaction of a transaction life-cycle sent by Mastercard:
* **REST API Field:** issuerInformation.transactionInformation
* **SCMP API Field:** payment_network_transaction_information
* **Simple Order API Field:** paymentNetworkTransactionInformation