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Mastercard Chargeback Reason Code

Mastercard Reason Code 4809: Transaction Not Reconciled

Category Processing ErrorsBy Payment Defender Editorial TeamUpdated July 17, 2026Last reviewed July 17, 2026

Mastercard-initiated Europe dispute

What Mastercard Reason Code 4809 Means

Mastercard reason code 4809 identifies a dispute in which an authorized transaction was not properly reconciled or cleared between the acquirer and issuer, leaving the record unmatched.

Why This Chargeback Happens

This dispute commonly occurs when clearing records do not match the corresponding authorization, when a transaction is submitted late or with mismatched identifiers, or when reconciliation between systems fails. It is a Mastercard-initiated dispute in the Europe region.

What the Cardholder or Issuer Is Claiming

Mastercard or the issuer is asserting that the transaction could not be reconciled against its authorization and should be reversed.

What Merchants Should Review

Review the authorization identifiers, clearing reference numbers, submission dates, and reconciliation reports to confirm the transaction matches a valid, timely authorization.

Recommended Chargeback Evidence

  • Authorization records matching the clearing submission identifiers
  • Reconciliation reports linking the authorization to the cleared amount
  • Settlement records confirming timely submission
  • Correspondence with the acquirer documenting the matched record

How to Prevent Similar Disputes

Reconciliation disputes may be reduced by submitting clearing records promptly with consistent identifiers, reconciling authorizations against settlement daily, and resolving unmatched records quickly with your acquirer.

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

Last reviewed July 17, 2026

Chargeback rules, evidence requirements, and response options may vary by card network, region, processor, and dispute circumstances.

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Turn the Code Into Action

Know What to Do Next

Payment Defender helps merchants connect reason codes to transaction history, dispute alerts, refunds, evidence, fraud activity, VAMP exposure, and payment-performance decisions.

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