If a merchant doesn’t respond to a chargeback, the disputed amount is pulled from the merchant’s account automatically and the case closes as a default loss. The card networks treat silence as an admission that the cardholder’s claim is valid, so there is no second chance to submit evidence. The merchant also pays a per-chargeback fee, forfeits the processing fees from the original sale, and the loss counts toward the chargeback ratio that card networks use to decide whether the business can keep accepting cards at all.
The Default Loss Is Final
When a cardholder disputes a charge, the issuing bank notifies the merchant’s payment processor, which passes the dispute to the merchant with a response window and a request for what the industry calls compelling evidence. If nothing arrives before the deadline, the acquiring bank processes the reversal as a default loss. Funds move from the merchant’s settlement account back to the cardholder, and the file is closed.
This is not a provisional hold or a temporary ruling. A default loss is final for that stage of the dispute process. The merchant forfeits the right to submit evidence, and the acquirer treats the matter as resolved.
The real damage isn’t just the sale price. By the time a chargeback arrives, the merchant has usually already shipped the product or delivered the service and absorbed the associated costs. A single unanswered chargeback typically means losing the sale price plus the wholesale cost of the goods, shipping, labor, and any packaging or fulfillment expenses. A $200 order can easily represent $300 or more in actual losses once fulfillment is factored in.
The Response Window You Missed
Each card network sets its own deadline, and missing it by a day triggers the default loss. Visa gives merchants 30 days from the day after a dispute is initiated, applied uniformly across all Visa reason codes.1Visa. Dispute Management Guidelines for Visa Merchants Mastercard’s timeframe is generally 45 days, though it can vary by reason code. Payment processors won’t accept late submissions regardless of the reason.
If the deadline is still open, a response has to directly address the reason code on the chargeback. Submitting the wrong type of documentation is almost as ineffective as submitting nothing. If the deadline has already passed, the reversal stands and evidence is no longer accepted through the dispute process.
Fees You Still Owe After Losing
Every chargeback carries an administrative fee assessed by the acquiring bank, regardless of outcome. Whether you fight and win or ignore the dispute entirely, the fee hits your settlement account. These fees vary by processor and contract but typically fall between $20 and $100 per chargeback. Some processors charge steeper penalties for cases where the merchant never responded.
You also lose the interchange and assessment fees paid during the original sale. When a credit card transaction is processed, a portion goes to the issuing bank as interchange and to the card network as an assessment. When that transaction is reversed through a chargeback, those fees don’t come back. You effectively paid to process a sale that no longer exists. Between the chargeback fee, the forfeited processing costs, and the lost merchandise, a single unanswered chargeback on a $100 transaction can easily cost $140 to $170 in total.
Processors that see a pattern of non-responses may increase your reserve account requirement. A reserve holds back a percentage of daily settlements as a cushion against future chargebacks. Moving from a 5% reserve to 10% locks up real operating cash.
How Non-Responses Push You Toward Network Monitoring
Card networks track every merchant’s chargeback activity as a ratio comparing chargebacks to transactions processed. Exceeding the threshold triggers mandatory enrollment in a monitoring program, which brings escalating fines and close scrutiny from your acquirer. Because an unanswered chargeback is an automatic loss, habitual non-responses inflate this ratio faster than merchants tend to expect.
Visa’s Acquirer Monitoring Program
In June 2025, Visa consolidated its separate fraud and dispute monitoring programs into a single system called the Visa Acquirer Monitoring Program, or VAMP. VAMP uses a combined ratio that counts both fraud reports and chargebacks against settled transactions. For U.S. merchants, the Excessive Merchant threshold was initially set at a VAMP ratio of 220 basis points (2.2%) with at least 1,500 monthly fraud-plus-dispute incidents. On April 1, 2026, that threshold drops to 150 basis points (1.5%).2Visa. Visa Acquirer Monitoring Program Fact Sheet 2025
Merchants who routinely ignore disputes feed both sides of the combined ratio, since defaulted chargebacks and fraud reports both contribute.
Mastercard’s Excessive Chargeback Program
Mastercard runs the Excessive Chargeback Program with two tiers. The first tier, Excessive Chargeback Merchant, flags businesses that hit 100 or more chargebacks in a calendar month with a chargeback-to-transaction ratio of 1.5% or higher. The second tier, High Excessive Chargeback Merchant, kicks in at 300 or more chargebacks and a ratio of 3.0% or above.3Braintree. Excessive Chargeback Program A merchant must meet both the count and the ratio thresholds simultaneously to be flagged.
Once enrolled, the merchant submits a remediation plan to their acquiring bank and has to demonstrate measurable improvement. Fines start in the second consecutive month of non-compliance and escalate from there.4JPMorgan Chase. MasterCard Excessive Chargeback Program Guide Merchants who can’t bring their numbers down face fines that can reach five figures per month, and the acquiring bank comes under pressure from the network to terminate the relationship.
Losing Your Merchant Account and the MATCH List
The worst outcome of sustained non-compliance is losing the ability to accept credit cards at all. When an acquirer terminates a merchant’s processing agreement due to excessive chargebacks, it reports the termination to the card networks. The business name, owner information, and tax ID are entered into a shared database that other processors check before approving new merchant accounts.
Visa maintains the Visa Merchant Screening Service, and Mastercard operates the Member Alert to Control High-risk Merchants system, commonly called MATCH. These databases function as a blacklist.5Stripe Documentation. High Risk Merchant Lists Once a business appears on MATCH, virtually no mainstream processor will approve a new account. The listing stays active for five years from the date of termination, and only the acquirer that added the listing can request its removal.
For most businesses, losing card processing is an existential threat. Operating on cash, checks, or cryptocurrency alone loses a large share of the customer base overnight.
What You Can Still Do After a Default Loss
Losing a chargeback by default closes the dispute process, but it doesn’t close every avenue for recovery.
Deducting the Loss on Your Taxes
You may be able to deduct the lost revenue as a bad debt under federal tax law. The Internal Revenue Code allows a deduction for debts that become wholly or partially worthless during the tax year.6Office of the Law Revision Counsel. 26 USC 166 – Bad Debts The path depends on your accounting method.
Accrual-basis businesses have already recorded the sale as revenue when it was earned. When the chargeback reverses payment, the unreceived amount has a tax basis and qualifies for a bad debt deduction. Cash-basis businesses face a harder situation: if you never actually received the payment because the chargeback clawed it back first, you may not have included it in income yet, so there’s nothing to deduct.
Chargeback fees and processing costs paid to the acquirer are generally deductible as ordinary business expenses in the year they’re incurred, regardless of accounting method.
Suing the Customer
A chargeback is a private dispute resolution process run by card networks and banks. It is not a court proceeding, and its outcome has no binding legal effect on either party’s contractual rights. You can still sue the customer in civil court for breach of contract or unjust enrichment.
Small claims court is often the practical venue for individual transactions, with filing fees that vary by jurisdiction. You would need to prove that a valid contract existed, the customer received what they paid for, and the chargeback left you uncompensated. The economics only work when the transaction is large enough to justify the time and filing costs and when you have the evidence to win. For clear cases of friendly fraud, though, the bank’s ruling is not the final word.
A Note on Debit Card Disputes
The framework above applies to credit card transactions governed by card network rules. Debit card disputes follow a different path. When a consumer disputes a debit card transaction, the process is governed by Regulation E, the federal rule implementing the Electronic Fund Transfer Act.7Consumer Financial Protection Bureau. 1005.11 Procedures for Resolving Errors The consumer’s bank must investigate alleged errors within specific timeframes and provisionally credit the consumer’s account during the investigation. The consumer must notify their bank within 60 days of receiving the statement showing the disputed transaction. Deadlines and procedures may differ from credit card chargebacks even when the same card network’s logo appears on the card.