What Happens If a Merchant Disputes a Chargeback?

When a merchant disputes a chargeback, they enter a formal process called representment: the merchant assembles evidence that the original charge was valid, submits it through their payment processor, and waits for the cardholder’s bank to reconsider. The disputed funds have already been pulled from the merchant’s account by this point, so representment is an attempt to claw them back. Win rates hover around 45%, and even a successful outcome can take months to reach.

What happens next depends on how the issuing bank reads your evidence, whether it decides to push back, and whether the amount at stake justifies escalation. Here is how the process moves.

Stage One: Representment

Representment is the merchant’s formal response to the chargeback. You do not deal with Visa or Mastercard directly. Everything flows through your payment processor, who packages your evidence and forwards it to the cardholder’s bank under the relevant card network’s rules.

The evidence has to match the reason code the issuer assigned to the dispute. Generic documentation gets rejected. What counts as strong evidence depends on why the cardholder complained.

Goods or Services Not Received

You need proof of delivery or fulfillment. Under Visa’s rules, that can be photos or emails linking the recipient to the cardholder, proof that merchandise reached the cardholder’s address, or, for business deliveries, evidence that the cardholder works at the delivery address. A signature is not required for business address deliveries.¹ For digital services, server logs showing the customer’s login, IP address, and usage after the purchase date do the same work.

Unauthorized Transaction

This category covers cardholders who actually made the purchase and later claim they did not. The two strongest pieces of evidence are the Address Verification Service result, showing whether the billing address matched what the issuer had on file, and the Card Verification Value result, showing the security code was entered correctly. A full AVS match paired with a successful CVV check is substantially stronger than a partial match on either one. Device fingerprinting, geolocation near the billing address, and prior purchase history from the same account all reinforce the case.

For card-not-present fraud claims, Visa’s Compelling Evidence 3.0 rule gives merchants an extra route. If you can point to at least two previous undisputed transactions from the same customer that share identifying data with the disputed one, the disputed charge is much harder to call unauthorized. At least two of four data elements must match: user account ID, IP address, shipping address, or device ID and fingerprint. One of the two matching elements must be either the IP address or the device ID.²

Product Not as Described or Defective

Here the evidence shifts. You want to show your return policy was reasonable and the customer did not use it. Submit the policy text, any correspondence where you offered a refund or exchange, and the customer’s response. Photos of the item before shipping and quality control records help counter defect claims specifically.

The burden of proof sits entirely with the merchant across all three categories. The issuing bank starts from the assumption that the cardholder’s complaint has merit, and your evidence has to overcome that presumption.

Deadlines and Fees Kick in Immediately

Representment runs on tight clocks set by the card networks. Visa’s framework allows 30 days to submit a dispute response and 30 days at the pre-arbitration stage, with just 10 days to file for arbitration if it reaches that point.³ Mastercard sets its own deadlines that vary by dispute category. Miss one and you forfeit automatically. There is no grace period and no appeal.

Your working deadline is usually shorter than the network’s. Your processor needs time to review your submission before sending it on, so a 30-day network window might translate to 20 days on your end. Treat whatever your processor tells you as absolute.

Fighting a chargeback also costs money regardless of outcome. The initial chargeback typically carries a fee of $20 to $100 from your processor, and some processors add a separate representment fee for handling the evidence submission. A useful rule of thumb: if the disputed amount is less than twice the combined fees, accepting the loss usually makes more sense than fighting it.

Stage Two: The Issuer Reviews Your Evidence

Once your processor forwards the evidence, the cardholder’s bank reviews it against the original complaint. Review typically takes 30 to 45 days and produces one of three results.

The best outcome is a reversal in your favor. The issuer accepts your evidence and returns the disputed funds to your account. Some processors also refund the original chargeback fee when you win, though that depends on your processing agreement.

The second outcome is that the issuer sides with the cardholder. The chargeback stands and the loss is permanent. You lose the revenue, the cost of the product or service, the processing fees from the original sale, and the chargeback fee. For physical goods, the inventory is also gone.

The third outcome is that the issuer reviews your evidence but still believes the cardholder is right and pushes back. That triggers the next stage.

Stage Three: Pre-Arbitration

Pre-arbitration is the phase most merchants do not know exists until they are in it. Both Visa and Mastercard give the issuer a window to challenge the representment outcome, and your processor gets another chance to respond. Each side works under 30-day deadlines.³

Under Visa’s system, the issuer has to specifically address the evidence you submitted rather than just reasserting the original claim. If the issuer misses the deadline, they accept liability and the dispute closes in your favor. The reverse also holds. If your processor fails to respond to the issuer’s pre-arbitration filing in time, you lose by default.

Many disputes quietly die at this stage. Both sides have now seen each other’s evidence, and one party often concludes that pushing further is not worth the cost. If neither backs down, the dispute advances to arbitration.

Stage Four: Arbitration

Arbitration is the final stop. The card network itself reviews the evidence from both sides and issues a binding decision. Neither the issuer nor your processor can appeal.

The economics are deliberately punitive. Visa’s case filing fee for the losing party is $600, and the losing side typically pays additional administrative penalties on top. Mastercard’s structure is similar. Factoring in filing fees, potential penalties, and the risk of losing, total cost exposure for the losing party can reach several thousand dollars. Your processor acts as a gatekeeper 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 alone adds roughly 60 to 90 days to the timeline. A dispute that started with a simple chargeback notification can easily span six months from start to finish when it runs the full distance.

What Disputing Does Not Fix

Winning representment gets your money back on that transaction. It does not undo the fact that the chargeback was filed. Both Visa and Mastercard track chargeback ratios through monitoring programs, and disputes count toward those ratios whether you win or lose them. A merchant fighting a rising volume of chargebacks may be recovering funds case by case while still crossing thresholds that can trigger fines or, in serious cases, loss of processing capability. Representment is the tool for individual disputes. Ratio problems require separate work on prevention.