Mastercard Chargeback Reason Code
Mastercard Reason Code 4999: Domestic Chargeback Dispute
Category OtherBy Payment Defender Editorial TeamUpdated July 17, 2026Last reviewed July 17, 2026
Europe region only
What Mastercard Reason Code 4999 Means
Mastercard reason code 4999 is a Europe-region domestic dispute condition used for chargebacks defined by local domestic rules that do not map to a standard intraregional or interregional reason code.
Why This Chargeback Happens
This dispute commonly occurs when a domestic transaction in the Europe region is disputed under country-specific rules or arrangements that fall outside the standard reason-code set.
What the Cardholder or Issuer Is Claiming
The issuer is asserting a domestic dispute defined by local Europe-region rules rather than a standard cross-border reason code.
What Merchants Should Review
Review the applicable domestic rules communicated by your acquirer, the transaction details, and any documentation supporting a valid, correctly processed sale.
Recommended Chargeback Evidence
- Transaction and authorization records for the disputed sale
- Documentation responsive to the specific domestic dispute reason
- Correspondence with your acquirer about applicable domestic rules
- Proof the goods or services were provided as agreed
How to Prevent Similar Disputes
Domestic disputes may be reduced by understanding the local rules that apply to your Europe-region transactions, keeping thorough records, and working with your acquirer to respond within the applicable domestic framework.
Important Limitations
This page is educational and reflects common industry usage. Reason code 4999 applies to the Europe region only and is governed by domestic rules that vary by country and change over time. 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.