Reason code

This code is used when a cardholder disputes a transaction, claiming that a single purchase was processed more than once, resulting in duplicate charges on their account.

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To address a chargeback under reason code 4534:​

• Provide Evidence of Separate Transactions: If multiple charges are legitimate, submit documentation demonstrating that each transaction was authorized separately by the cardholder. This may include distinct sales receipts, invoices, or order confirmations corresponding to each charge.​
  
  
• Acknowledge and Rectify Duplicate Charges: If a duplicate charge did occur, acknowledge the error and provide proof that a credit has been issued to the cardholder's account to correct the mistake.

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To minimize the risk of chargebacks under reason code 4534:

• Implement Transaction Verification Processes: Before processing, verify that each transaction is entered only once to prevent duplicate charges.​
• Monitor and Reconcile Transactions Regularly: Regularly review transaction records to identify and correct any duplicate entries promptly.​
• Train Staff on Proper Transaction Handling: Educate employees on the importance of accurate transaction processing and the potential implications of duplicate charges.​
• Utilize Reliable Payment Processing Systems: Employ payment systems that have built-in checks to detect and prevent duplicate transaction processing.

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