Learn the domain· 6 min read
What is a chargeback?
A chargeback is a forced reversalof a card payment, initiated by the cardholder's bank (the issuer) and executed through the card network. It is not the merchant agreeing to refund a customer — it is the issuer pulling funds back out of the merchant's account, with the merchant getting a chance to contest it afterwards.
Last reviewed against primary sources on .
The minimum-viable definition
When a Visa or Mastercard cardholder believes a transaction shouldn't have been charged — they didn't authorize it, the goods never arrived, they were billed twice — they can call their bank. The bank investigates briefly, decides it has a basis to act, and submits a disputethrough the card network. The network debits the merchant's acquiring bank, which debits the merchant. The disputed amount is now out of the merchant's account; the merchant's job is to either accept that loss or submit evidence proving the charge was legitimate.
The mechanism exists because card payments are reversible by design. When you pay by cash you've already handed the money over — getting it back requires the merchant's cooperation. Card networks built reversibility into their rules so cardholders would trust the rails enough to use them; without that trust the whole system collapses.
Chargeback vs. refund vs. inquiry
| Mechanism | Initiated by | Funds movement | Costs the merchant |
|---|---|---|---|
| Refund | Merchant (voluntary) | Merchant credits the card, processed as a normal transaction. | Interchange + processing fees are often non-refundable; otherwise just the goods cost. |
| Inquiry / RFI | Issuer (on cardholder's behalf) | None yet — the issuer asks the merchant for clarification before raising a chargeback. | Operational cost only; no fee, no funds withdrawn. |
| Chargeback | Issuer (formal) | Network debits acquirer; acquirer debits merchant. | Disputed amount + chargeback fee (typically $15–$25 per case from a US acquirer; higher for high-risk merchants). |
Why it works the way it does
Two regulatory regimes back the cardholder's right to dispute. In the United States these are Regulation E (debit cards, prepaid cards, ACH — implements the Electronic Fund Transfer Act) and Regulation Z (credit cards — implements the Truth in Lending Act, specifically the Fair Credit Billing Act). Both give the cardholder a statutory right to challenge a charge; the card networks layer their own rulebooks on top to operationalise it.
Regulation E (12 CFR § 1005.11)
Consumer must notify the bank within 60 days of the statement that reflects the error. The bank must investigate promptly and determine whether an error occurred within 10 business days of receiving notice (extended to 45 days for some debit transactions if the bank credits the account in the interim).
Visa Core Rules (current edition)
The cardholder generally has 120 days from the transaction date — or from the expected-delivery date for services-not-received claims — to dispute. Authorization / card-recovery-bulletin disputes get 75 days; not-received-or-defective claims can stretch up to 540 days from the transaction date.
A regulator says the cardholder has a right to reverse the charge; a scheme rulebook spells out how that reversal flows through the network — the deadlines, the message types, the formats. As a merchant you operate inside both. Reg E protects the consumer; Visa / Mastercard rules tell your acquirer what packets to send.
Three flavours of dispute
Most disputes fall into one of three buckets, and the merchant response strategy is different for each:
- 1True fraud.The card was stolen or compromised; a stranger made the purchase. The merchant rarely wins these — the cardholder genuinely didn't authorise the transaction. The right play is fraud prevention (3-D Secure, device fingerprinting, velocity rules) so true-fraud disputes happen as rarely as possible.
- 2Merchant error. Double charge, wrong amount, subscription not cancelled when asked, shipment lost in transit. These are usually best accepted — fighting evidence-light cases damages your ratios and your acquirer relationship.
- 3Friendly fraud.The cardholder did authorise the purchase but reverses it anyway — buyer's remorse, "I don't recognise this descriptor", abuse of the dispute system. By industry estimates this is now the dominant chargeback category for card-not-present commerce. Schemes responded with compelling-evidence programs (Visa CE 3.0, Mastercard First-Party Trust) that explicitly let merchants win these when they can prove the cardholder has a buying history consistent with the disputed transaction.
The shape of the rest of this section
The other pages drill into each layer of the system. If you're building anything that touches disputes — a chargeback response workflow, a fraud rule, an agent that handles RFIs — the right reading order is:
- The players — who's who in the four-party model and where money flows.
- Lifecycle — the actual sequence of events from inquiry to arbitration.
- Reason codes — what the issuer is claiming, code by code.
- Evidence — what wins a case, by reason category.
Sources
- 12 CFR § 1005.11 — Procedures for Resolving Errors — 60-day cardholder notification window + 10-business-day investigation requirement under Regulation E.
- 12 CFR § 1026.13 — Billing Error Resolution — Equivalent error-resolution rights for credit card billing errors under Regulation Z (Fair Credit Billing Act).
- Visa Core Rules and Visa Product and Service Rules (current public edition) — 120 / 75 / 540-day cardholder dispute windows; merchant 30-day response window per phase.
- CFPB · § 1005.11 Procedures for resolving errors — Plain-language exposition of the Reg E investigation timeline a bank must follow.
- Consumer Compliance Outlook · Error Resolution Procedures (2025) — Regulator-side overview of how Reg E and Reg Z error-resolution provisions interact.