When a merchant disputes a chargeback, they start a formal process called representment: their payment processor forwards an evidence package to the cardholder’s bank, which reviews it over roughly 30 to 45 days and decides whether to return the money, let the chargeback stand, or escalate the fight. Win rates sit around 45%, and the full process can stretch six months if neither side gives up. The money has already been pulled from the merchant’s account before any of this begins, so representment is an attempt to claw it back rather than a hold on the funds.
Representment: Submitting the Evidence
The merchant never deals directly with Visa or Mastercard during a dispute. Everything flows through the payment processor, who acts as the merchant’s representative and handles the technical submission to the cardholder’s bank.
Each chargeback carries a reason code, and the evidence has to address that specific code. For a claim that goods never arrived, that means proof of delivery tying the recipient to the cardholder. For an “unauthorized transaction” claim — the friendly fraud category where the cardholder actually made the purchase but denies it — the useful evidence is the Address Verification Service result, the CVV match, device fingerprints, IP data, and any history showing the customer logged in and used the product. For “not as described” claims, the merchant submits the published return policy and any correspondence offering a refund the customer ignored.
The burden of proof sits entirely with the merchant. The issuing bank starts from the assumption that the cardholder’s complaint has merit, and the evidence has to overcome that presumption on the first submission. Generic documentation gets rejected.
Deadlines are tight and unforgiving. Visa gives 30 days to respond to the initial dispute. Mastercard sets its own windows that vary by dispute category. In practice, the processor imposes a shorter internal deadline because it needs time to review the package before forwarding it; if the network allows 30 days, the processor may give the merchant 20. Missing a deadline at any stage means automatic forfeiture. There is no grace period and no appeal.
What the Issuer Decides
Once the processor forwards the evidence, the cardholder’s bank reviews it against the original complaint. The review takes 30 to 45 days and produces one of three results.
The best outcome is a reversal in the merchant’s favor. The issuer accepts the evidence and returns the disputed funds to the merchant’s account. Some processors also refund the original chargeback fee on a win, though that depends on the processing agreement.
The second outcome is that the issuer sides with the cardholder. The chargeback stands. The loss is permanent, and the merchant is out the revenue, the cost of the product or service, the original sale’s processing fees, and the chargeback fee. For physical goods, the inventory is gone too.
The third possibility is that the issuer reviews the evidence, still believes the cardholder’s claim is valid, and pushes back. That triggers the next stage.
Pre-Arbitration
Both Visa and Mastercard have a pre-arbitration phase that sits between representment and formal arbitration. The issuer can challenge the representment outcome, and the merchant’s processor gets another chance to respond. Each side operates under a 30-day hard deadline.
Under Visa’s system, the issuer has to specifically address the evidence the merchant submitted; they cannot just reassert the original claim. If the issuer misses the deadline, they accept liability and the dispute closes in the merchant’s favor. The same works in reverse. If the processor fails to respond in time, the merchant loses by default.
Many disputes quietly end at this stage. Both sides have now seen each other’s evidence, and one party usually concludes the case is not worth pushing further. If neither backs down, the dispute advances to arbitration.
Arbitration
Arbitration is the final stop. The card network itself reviews all evidence from both sides and issues a binding decision. Neither the issuer nor the merchant’s processor can appeal.
The fees are designed to discourage escalation. Visa’s case filing fee for the losing party is $600, and the loser typically pays additional administrative penalties on top. Mastercard’s structure is similar. With filing fees, penalties, and the risk of losing, total exposure for the losing side can reach several thousand dollars. The merchant has only 10 days to file for arbitration once the option is on the table.
The processor plays a gatekeeper role here. Most will refuse to advance a case to arbitration unless the disputed amount justifies the risk, or the case involves clear fraud worth fighting on principle. Arbitration adds another 60 to 90 days to the timeline, which is why a single disputed transaction can run six months from the first chargeback notice to the final decision.
The Fees That Apply Either Way
Costs stack up regardless of outcome. The initial chargeback itself typically carries a fee of $20 to $100 from the processor. Some processors charge an additional representment fee for handling the evidence submission. These apply whether the merchant wins or loses.
That changes the math on small disputes. Fighting a $15 chargeback rarely makes financial sense once the fees are counted. A workable rule: if the disputed amount is less than twice the combined fees, accepting the loss and spending the effort on prevention is usually the better call.
Disputing Doesn’t Protect the Chargeback Ratio
One point worth being clear on: winning a representment case returns the money, but it does not necessarily erase the chargeback from the ratios Visa and Mastercard track for merchant monitoring. Both networks run programs that flag merchants whose dispute ratios climb too high, and a pattern of chargebacks can threaten a merchant’s ability to accept card payments at all. Disputing individual cases is a recovery tool, not a defense against those monitoring thresholds. Deflecting disputes before they become formal chargebacks — through services like Visa’s Rapid Dispute Resolution or alert networks like Ethoca and Verifi — is a separate workstream from representment, and the two serve different purposes.
For any single chargeback a merchant chooses to fight, the process itself is straightforward in shape even when it is slow in practice. Submit the right evidence against the specific reason code, meet every deadline the processor sets, and wait. The bank decides. If they push back, decide whether the amount justifies pre-arbitration. If it still is not resolved and the dollars are large enough to risk the arbitration fees, let the network make the final call. Most disputes end well before that point, one way or the other.