4840 – Fraudulent Processing of Transactions

Dispute Condition Code




Message System

Why did I get this chargeback?

The cardholder claims to have authorized one card-present transaction with you, but one or more additional transactions conducted in the next 15 minutes were not authorized.

How long can the issuer wait to file this chargeback?

The maximum amount of time that can pass between the transaction processing date and the chargeback processing date is 120 calendar days.

What do I need to fight this chargeback?

Available chargeback response options include:

  • Explanation and documentation to refute the cardholder’s claim, or
  • Proof that the chargeback is invalid because it doesn’t adhere to Mastercard requirements, or
  • Proof you have already refunded the transaction and credited the cardholder’s account, or
  • Proof the cardholder no longer wishes to dispute the transaction

Additional condition-specific compelling evidence options:

Two Separate Transactions:

  • Proof you processed two separate transactions that were both authorized and the transactions are for different goods or services

PIN Transaction:

  • Proof that a PIN was provided and submitted with the authorization request for both transactions

Addendum Charge Transactions:

  • Proof the cardholder participated in the original transaction and the second charge is also valid

How can I avoid this chargeback in the future?

  • If you notice a duplicate transaction, issue a credit as soon as possible.
  • Double check all transaction receipts before they are deposited.
  • Only send batches one time.
  • If the customer wants to change to a different form of payment after initially offering the payment card, be sure to void the charge.

More MASTERCARD Reason Codes

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