Mastercard Chargeback Reason Code
Mastercard Reason Code 4804: Transaction Multiple Processing
Category Processing ErrorsBy Payment Defender Editorial TeamUpdated July 17, 2026Last reviewed July 17, 2026
Mastercard-initiated Europe dispute
What Mastercard Reason Code 4804 Means
Mastercard reason code 4804 identifies a dispute in which a single cardholder transaction appears to have been processed and settled more than once, resulting in duplicate charges to the account.
Why This Chargeback Happens
This dispute commonly occurs when a terminal or gateway submits the same authorization twice, when a batch is uploaded more than once, or when a manual re-key duplicates a charge that already cleared. It is a Mastercard-initiated dispute in the Europe region rather than a cardholder-driven claim.
What the Cardholder or Issuer Is Claiming
Mastercard or the issuer is asserting that the same underlying transaction was submitted for clearing multiple times and one or more of the entries should be reversed.
What Merchants Should Review
Review the settlement batch history, authorization identifiers, transaction reference numbers, and terminal logs to confirm whether the charges represent one purchase or genuinely separate purchases made close together.
Recommended Chargeback Evidence
- Itemized transaction logs showing distinct authorization codes for each charge
- Signed receipts or order records that document separate purchases
- Batch and settlement reports identifying unique reference numbers
- Correspondence confirming any refund already issued for a duplicate
How to Prevent Similar Disputes
Duplicate processing disputes may be reduced by reconciling settlement batches before upload, avoiding repeated batch submissions, monitoring terminal timeouts that can trigger re-keying, and promptly refunding any confirmed duplicate before it is disputed.
Important Limitations
This page is educational and reflects common industry usage. Mastercard dispute rules, timelines, and evidence requirements change over time and vary by region and dispute reason. Merchants should confirm current requirements with their acquirer or processor before responding to any dispute.
Related Reason Codes
Sources and Review Information
- Mastercard: Mastercard Chargeback Guide
Last reviewed July 17, 2026
Chargeback rules, evidence requirements, and response options may vary by card network, region, processor, and dispute circumstances.