Chargeback

A chargeback is a transaction reversal initiated by a card issuer on behalf of a cardholder, funded through the card network (Visa, Mastercard, American Express, Discover) dispute process. Unlike a refund (which the merchant initiates voluntarily), a chargeback compels the merchant's bank to return funds to the issuer, which credits the cardholder.

Chargebacks exist under both credit and debit card systems, but the underlying legal basis and scope differ significantly:

For credit cards, the chargeback right derives from Regulation Z 12 CFR 1026.13 (billing-error claim) and from network rules. The Reg Z right covers billing errors including goods/services not delivered as agreed. Network rules (Visa Dispute Resolution Rules, Mastercard Chargeback Guide) add additional reason codes including fraud, quality disputes, and processing errors. The combination gives credit card holders robust chargeback access.

For debit cards, the chargeback is a voluntary extension of network rules, not a statutory right. Regulation E 12 CFR 1005.11 only requires the bank to investigate EFT errors, not to process chargebacks for merchant disputes. Visa and Mastercard network rules do extend some chargeback reason codes to debit transactions, but banks can be more restrictive in practice, and the timelines can differ.

Chargeback reason codes are maintained by each network: Visa uses numeric codes (e.g., 10.4 for fraud, 13.3 for goods not received); Mastercard uses alphanumeric codes (4808 for authorisation, 4853 for goods/services). Both networks update their dispute guides annually.

Merchant impact: Each chargeback costs the merchant the transaction amount plus a chargeback fee ($15-$100 from the acquiring bank). Merchants with chargeback rates above 1% of transactions risk losing their ability to accept cards. This merchant-side risk is why the dispute system generally works: merchants prefer to issue refunds rather than fight chargebacks that cost more in fees than the transaction value.