A merchant can't just refuse a chargeback the way it might refuse a refund request. Once a card issuer files one, the money leaves the merchant's account automatically, and the only path back is a formal process called representment, where the merchant submits evidence within the required deadline and asks the issuer to reverse its own decision. That's meaningfully different from refusing anything. It's contesting a decision that's already been made, on the issuer's terms, inside a deadline the merchant doesn't control.
Whether that contest succeeds is a separate question entirely from whether the merchant is technically allowed to try, and it's worth understanding the difference if you're on either side of one, since chargebacks aren't uncommon in e-commerce.
For merchants, the stakes are immediate: lost funds, stricter evidence rules, and potential damage to account standing. For consumers, it clarifies what a business can and cannot do once a dispute is underway. In this article, we cover what chargebacks are, how representment works, what merchant win rates are, what recent 2026 rule changes affect the process, the stages of a dispute, and what both merchants and cardholders should expect.
If you don't kow whether you're eligible for a chargeback or a refund, make sure to check out our chargeback vs. refund guide first.
As soon as a customer files a chargeback with their bank, the merchant starts the chargeback process. The merchant’s response must relate to the specific chargeback reason code the issuer assigned to the dispute. The card network rules define what a valid response is and what evidence will be accepted. Visa, for example, accepts a variety of evidence that can help prove a transaction was legit. Proof of delivery clears a non-receipt dispute. Signed receipts or signed contracts can help prove purchase authorization when that’s the reason code. If you submit the wrong kind of evidence, even if it’s strong evidence, you automatically lose whether or not the underlying transaction was legitimate.
Merchants usually have 7-10 days to respond. If the merchant does not respond at all within the allowed response period, the dispute does not automatically stay open – the default is that non-response is treated as acceptance, the chargeback becomes final and non-contestable, and the merchant is usually charged an additional fee on top of the original chargeback cost for failing to respond either way.
The win rates differ significantly based on the process used during dispute management. Competitors' statistics show that friendly fraud takes up more than 70% of chargebacks, which is a chargeback fraud affecting even valid purchases. At the same time, those statistics indicate that 75% of businesses have witnessed increased fraudulent chargebacks in 2023.
Industry data shows that win rates for manual disputes typically average between 20 to 30%, while rates for manual and unassisted chargeback resolution often fall in the 8 to 20% range. Both sources emphasize that with improved evidence and process, these rates rise significantly - well-prepared disputes can succeed at 70% and above, and automated representment solutions are able to achieve even 80% win rates in some cases.
It is not the question whether merchants are right or wrong here; it depends on whether the provided evidence meets requirements of a certain reason code, as 34% of chargebacks come from fraudulent transactions rather than merchant errors.
Assumption
What's actually true
What people assume
Can a merchant refuse to process a chargeback?
No. The funds are debited automatically once the issuing bank files it, and that bank also reviews any later merchant challenge; the merchant can only contest the outcome afterward
"The merchant can just say no and keep the money"
Does strong evidence guarantee a win?
No. Evidence has to match the specific reason code, or it's an automatic loss regardless of quality
"Any solid proof of the sale should be enough"
Does ignoring a chargeback keep the case open?
No. Non-response is treated as acceptance, and often adds a separate fee
"If I don't respond, nothing happens either way"
Can a merchant appeal after losing representment?
Yes. This is how chargebacks work in unresolved cases: they can move through representment, pre-arbitration, and arbitration, so resolution can take weeks to months before the card network issues a final ruling
"Once representment fails, that's the end of it"
Do refunds and chargebacks work the same way?
No. The refund process is handled directly by the merchant and usually takes three to seven business days, while chargebacks involve the issuing bank instead.
"They're basically the same thing with different names"
Does a merchant's win rate affect anything beyond that single case?
Yes. Every dispute counts toward network-tracked ratios that can flag or restrict an account regardless of outcome
"Winning or losing only affects that one transaction"
Assumption with pros and cons
Can a merchant refuse to process a chargeback?
No. The funds are debited automatically once the issuing bank files it, and that bank also reviews any later merchant challenge; the merchant can only contest the outcome afterward
"The merchant can just say no and keep the money"
Does strong evidence guarantee a win?
No. Evidence has to match the specific reason code, or it's an automatic loss regardless of quality
"Any solid proof of the sale should be enough"
Does ignoring a chargeback keep the case open?
No. Non-response is treated as acceptance, and often adds a separate fee
"If I don't respond, nothing happens either way"
Can a merchant appeal after losing representment?
Yes. This is how chargebacks work in unresolved cases: they can move through representment, pre-arbitration, and arbitration, so resolution can take weeks to months before the card network issues a final ruling
"Once representment fails, that's the end of it"
Do refunds and chargebacks work the same way?
No. The refund process is handled directly by the merchant and usually takes three to seven business days, while chargebacks involve the issuing bank instead.
"They're basically the same thing with different names"
Does a merchant's win rate affect anything beyond that single case?
Yes. Every dispute counts toward network-tracked ratios that can flag or restrict an account regardless of outcome
"Winning or losing only affects that one transaction"
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However, enforcement measures were particularly reinforced starting 2026. As reported by industry reports, VISA’s dispute monitoring ratio (VAMP) has been lowered from 2.2% to 1.5% as of April 1, 2026, with the introduction of a new $8 dispute fee for each chargeback once merchants fall under excessive limit.
Since the chargeback rate ratio includes both fraud and non-fraudulent claims of total transactions, then merchants who do not have high fraudulent rates can also be identified just because of the high rate of chargebacks regardless of whether merchants win or lose these disputes. It is partly the reason why preventing chargebacks is equally important as disputing individual chargebacks.
Clear billing descriptor is one method of preventing chargebacks, as customers will easily recognize any charges made on their statement, which reduces disputes. In addition, excellent customer service is another way of preventing disputes from being filed when complaints are immediately settled. In the case of card present transactions, EMV chip reader prevents fraud and subsequent chargebacks.
Nothing about all of the above impacts your right to challenge a charge – the Fair Credit Billing Act, 15 U.S.C. § 1666, ensures that – no matter how a merchant fights back. In cases involving refunds, return of goods or billing error, go to the merchant yourself first. A refund is something that takes place solely between the consumer and the merchant while chargeback involves the issuer too and is one of the disputes that customers file. It does mean, however, that the fact of merchant challenging the claim does not mean that merchant is acting in bad faith – representment is just one of the standard actions that merchants take within the procedure, not some way for them to cheat the consumer personally. If the merchant has documents confirming his claim and the issuer sees that he is right, the issuer will support him and the same will happen if the claim is proven to be an example of friendly fraud.
Checking a merchant's dispute history before you buy tells you something a single transaction never will: whether this is a business that works with the customer directly to solve problems, or one with a pattern of pushing every disagreement into a formal dispute. WebVouch reviews often surface exactly that pattern before you're the one filing a chargeback and finding out the hard way which kind of merchant you're dealing with.
No. Once a card issuer files a chargeback, funds are debited from the merchant automatically. The merchant can only contest that outcome through representment, submitting evidence within a set deadline, and the issuer decides whether to reverse it. In practice, that means they cannot refuse it outright, only challenge it through the chargeback dispute process.
Non-response is treated as acceptance. The chargeback becomes final and non-contestable, and the merchant is often charged an additional fee on top of the original chargeback cost.
Manual, unassisted responses win roughly 8 to 30% of the time depending on the source, but well-prepared disputes using evidence matched to the specific reason code can reach 70 to 80%. Many cases now involve friendly fraud, which is one reason strong evidence matters so much.
Yes. Chargeback fraud is treated like theft under the law, can lead to fines of $1,000 to $10,000, and in extreme cases can result in 1-3 years of imprisonment.
Not necessarily. Every filed chargeback, win or lose, generally still counts toward the ratios card networks use to monitor merchant accounts, which is why prevention matters as much as fighting individual cases after the fact.
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