Mastercard chargeback reason codes

How Mastercard disputes work

A Mastercard dispute runs through Mastercom in these stages:

1. Chargeback: the issuer charges the transaction back under a message reason code.
2. Second presentment: your acquirer answers with your evidence, generally within 45 calendar days of the chargeback.
3. Pre-arbitration: if the issuer still disagrees, it can file a pre-arbitration case; the acquirer has 30 days to accept or reject. For cardholder disputes the pre-arbitration step is part of the normal path; for some codes, including 4808, it is optional and the issuer can go straight to arbitration.
4. Arbitration case filing: the issuer files within 45 days of the second presentment and Mastercard rules on liability.

Verdikx is a fraud, chargeback and dispute platform for e-commerce and SaaS merchants, operated by Verdikx LLC. This page summarizes Mastercard's public Chargeback Guide; your acquirer agreement and processor terms also apply.

Time frames for the chargeback

• Authorization-related (4808): within 90 calendar days of the settlement or Central Site Business Date for most transactions.
• Point-of-Interaction Error (4834): within 90 days for most Mastercard transactions (120 days for Maestro and some European ATM transactions).
• Cardholder Dispute (4853): generally between 15 and 120 days from the transaction or delivery date; for goods not provided, up to 120 days from the latest expected delivery date; for interrupted services, never more than 540 days after the transaction.
• No Cardholder Authorization (4837): within 120 days of the Central Site Business Date of the transaction.

The chargeback time limit calculator works out these dates for a specific order.

Current codes versus legacy codes

The Mastercard Chargeback Guide (Merchant Edition, 13 May 2025) organizes Dual Message System chargebacks around 4808, 4853 (with 4850 installment billing and 4854 U.S. not-elsewhere-classified), 4837, 4849, 4870, 4871, 4834 and 4999 (Europe domestic only). Mastercard also initiates its own disputes under 4804, 4809 and 4811.

Older codes still appear on some processor dashboards and reports:

• 4807, 4812 fold into 4808. The guide says issuers may still use them but they "will eventually be eliminated".
• 4841, 4855, 4860 fold into 4853 (recurring cancellations, goods not provided and refunds not processed are now 4853 sub-reasons).
• 4831, 4846 fold into 4834 (amount differs and currency errors are 4834 sub-reasons). 4859 ATM claims are 4834; addendum and no-show claims are 4853 sub-reasons.
• 4840, 4863 no longer appear in the guide; acquirer documentation maps them to 4837.
• 4842 late presentment is not a separate code in the current guide; late or expired authorizations are handled under 4808.

If a case shows a legacy code, respond to the claim it describes using the evidence for the code it maps to.

How to read a Mastercard code

• The four-digit code (4837) is the Dual Message System code; two-digit versions (37) are used on the Single Message System for debit.
• The code tells you the family; the cardholder's claim and the issuer's supporting documents tell you the specific sub-reason (for example, 4853 can mean not as described, not provided, refund not processed or a cancelled recurring charge).
• Fraud chargebacks require the issuer to report the transaction to Mastercard's Fraud and Loss Database first, and an account with more than 35 fraud chargebacks, or a transaction approved after two earlier fraud chargebacks on the same card, cannot be charged back for fraud. Check this before you concede.

How Verdikx helps

Verdikx reads the Mastercard code on each case, maps legacy codes to the current family, applies the matching reason-code playbook and evidence checklist, and drafts a response from your order, payment, delivery and customer records for you to review. Banks and Mastercard decide outcomes; Verdikx does not guarantee them. Ethoca alerts are coming soon to Verdikx; see the Ethoca glossary entry and chargeback management.