What Happens If You Dispute a Transaction: Investigation, Denials, and Liability

When you dispute a transaction, your bank temporarily reverses the charge, opens an investigation, and decides within 30 to 90 days whether to make that reversal permanent or pull the money back out of your account. What happens if you dispute a transaction depends heavily on whether you used a credit card or a debit card, because two different federal laws govern the process. The Fair Credit Billing Act covers credit cards. The Electronic Fund Transfer Act covers debit cards and other electronic payments. The protections differ in ways that matter, especially around how much time the bank has and how much money you could still lose.

What the Bank Actually Does After You File

Once your dispute lands, the bank’s first job is to categorize it. Fraud, merchant error, goods not received, duplicate charge, quality complaint — each category follows a different set of rules established by the card networks (Visa, Mastercard, and so on), and each has its own “reason code” that determines what evidence matters and what deadlines apply.

The bank then pulls the transaction data: the time and location of the purchase, the merchant’s identifying information, the type of terminal used. It checks whether your claim fits the criteria for a chargeback under the applicable card network’s rules and whether you filed within the required timeframe. Card networks generally allow disputes within 120 days of the transaction date, though certain fraud cases run longer. If your claim doesn’t meet the basic eligibility requirements, the bank may close the dispute without ever forwarding it to the merchant.

Provisional Credit

In most cases, the bank issues a provisional credit that restores the disputed amount to your available balance while the investigation continues. For debit card disputes, the bank must issue this provisional credit within 10 business days if it needs more time to investigate.¹ The credit includes any interest that would have accrued on the missing funds. For credit card disputes, the issuer generally cannot try to collect the disputed amount while investigating.

A provisional credit is not a decision in your favor. It’s a placeholder. Treat the money as available but not guaranteed, because the bank can and will reverse it if the investigation concludes the original charge was valid.

The Merchant Gets a Chance to Fight Back

When the bank validates your initial claim, it issues a chargeback to the merchant’s bank, which pulls the disputed funds from the merchant’s account. The merchant then has a window, typically 20 to 45 days depending on the card network, to respond through a process called representment. The merchant essentially re-presents the charge with evidence that the transaction was legitimate.

What counts as evidence depends on the type of dispute. For physical goods, merchants submit delivery confirmations and tracking numbers. For services, they provide contracts or records showing the work was completed. For online card-not-present fraud claims, card networks now require merchants to show that previous undisputed transactions share identifying markers with the disputed one, such as device fingerprint, IP address, login credentials, or delivery address.² The bank weighs that evidence against your original claim and makes the final call.

How Long the Investigation Takes

Timelines depend on the card type and, for debit cards, the kind of transaction.

Credit Card Disputes

Your issuer must acknowledge your dispute in writing within 30 days of receiving your notice. From there, it has two complete billing cycles to resolve the claim, with a hard ceiling of 90 days total.³

Debit Card Disputes

The standard investigation window is 10 business days. If the bank needs more time and issues a provisional credit, the window extends to 45 calendar days.¹ Two categories of transactions get longer windows:

Point-of-sale debit card transactions, including purchases at a register, mail orders, and phone orders: up to 90 days.
International transactions not initiated within the United States: up to 90 days.

Because those categories cover most everyday debit card purchases, the majority of debit disputes can take up to three months to resolve.

How the Dispute Can End

There are two outcomes. The bank rules in your favor, or it doesn’t.

If the bank sides with you, the provisional credit becomes permanent and the case closes. The merchant absorbs the loss.

If the bank denies your dispute, the provisional credit gets pulled back from your account. For debit card disputes, the bank must report its findings to you within three business days of completing the investigation, including a written explanation of why it concluded no error occurred.¹ You have the right to request copies of the documents the bank relied on.⁴ For credit card disputes, the issuer must explain in writing why it believes the charge was correct and, on request, provide documentary evidence of the debt.³

What Happens to Interest and Your Credit

While a credit card dispute is being investigated, the issuer cannot report the disputed amount as delinquent to the credit bureaus. It can note that a billing dispute is in progress, but it cannot treat the balance as past due or threaten your credit rating during the investigation.⁵ You still have to pay the undisputed portion of your bill on time. Stop paying everything because of one disputed charge and the issuer can report the rest as delinquent.

If the issuer ultimately decides you owe some or all of the disputed amount, it can charge finance charges that accumulated while the amount was in dispute, but it must give you the same grace period you had before to pay without penalty.⁵ Once the dispute is resolved against you, normal payment obligations resume immediately. Miss that window and late payments hit your credit report like any other.

If the Bank Denies Your Dispute

A denial doesn’t have to be the end. Three options are available, and the right one depends on how much money is at stake and how strong your evidence is.

Push Back in Writing

For credit card disputes, if you receive the issuer’s explanation and still believe the charge is wrong, you can write back within 10 days stating that you refuse to pay the disputed amount. This doesn’t reopen the investigation, but it does trigger a protection: the issuer cannot report the disputed amount as delinquent without also reporting that the amount is in dispute, and it must tell you the name and address of every entity it reported to.⁶ That 10-day window is tight. Act quickly if you plan to push back.

File a Complaint With the CFPB

The Consumer Financial Protection Bureau accepts complaints against banks and credit card issuers. Submit a complaint online in about 10 minutes and the CFPB forwards it to the company.⁷ Companies generally respond within 15 days, with complex cases taking up to 60 days. You can include up to 50 pages of supporting documents, or file by phone at (855) 411-2372. A CFPB complaint doesn’t guarantee a reversal, but it puts regulatory pressure on the institution and creates a formal record if the dispute moves further.

Small Claims Court

When the dollar amount justifies it, you can sue the merchant directly. Small claims courts handle cases without lawyers and with minimal paperwork. Dollar limits vary by state, generally ranging from $2,500 to $25,000. Filing fees run from about $15 to over $300 depending on the jurisdiction and the amount you’re claiming. For a few hundred dollars, probably not worth it. For a contractor who never finished the job or an expensive item that arrived damaged, it’s a realistic path.

The Risk of Disputing Too Often

Banks track your dispute history, and filing too many chargebacks, or filing ones you know aren’t legitimate, can backfire.

Financial institutions share customer data through specialty consumer reporting agencies like Early Warning Services, which is owned by seven of the largest U.S. banks.⁸ When you apply for a new bank account, the receiving institution can pull your history from these agencies to assess risk. A pattern of frequent chargebacks, even ones resolved in your favor, can flag your profile and make it harder to open accounts elsewhere.

Banks can also close your existing account. There’s no required warning, and the bank’s terms of service almost certainly give it the right to terminate the relationship at any time. If a bank concludes you knowingly filed a false dispute to keep merchandise you actually received, that crosses from aggressive consumer behavior into potential fraud. Merchants increasingly pursue these cases, and card networks have built tools specifically to identify patterns of so-called friendly fraud.

Disputes exist to protect you from genuine errors and unauthorized charges. Using them as a refund shortcut or a buyer’s remorse tool can cost you your banking relationship and create a record that follows you to other institutions.

Deadlines and Liability for Unauthorized Charges

Before you file, know the clock. Your deadline to dispute and your financial exposure if you miss it both depend on the card type, and the gap between credit and debit protections is wider than most people realize.

Credit Cards

Under the Fair Credit Billing Act, you must send written notice to your card issuer within 60 days of the statement that first showed the error.³ Send it to the address the issuer designates for billing inquiries, which is different from the payment address. Include your name, account number, the amount you believe is wrong, and a brief explanation.⁵ Most banks now let you file through their app or website, which usually works fine, but the formal legal protections attach to the written notice. If a dispute escalates, that paper trail matters.

Federal law caps your liability for unauthorized credit card charges at $50, regardless of when you report them.³ Most major issuers voluntarily waive even that $50 through zero-liability policies.

Debit Cards

Debit cards carry a much harsher liability structure, and how quickly you report unauthorized charges directly determines how much you could owe:

Within 2 business days of learning about the loss or theft: liability capped at $50.
After 2 business days but within 60 days of your statement: liability can reach $500.
After 60 days from your statement: potentially unlimited liability for any unauthorized transfers that occurred after the 60-day window.

Those tiers come directly from the Electronic Fund Transfer Act.⁹ The unlimited exposure in the third tier is what catches people. If someone drains your checking account through a compromised debit card and you don’t notice for three months, you may have no legal right to get that money back.¹⁰ Check your statements regularly, and if you spot anything you didn’t authorize, contact your bank the same day.

1
Consumer Financial Protection Bureau. Regulation E 1005.11 – Procedures for Resolving Errors
2
ICBA. How Visa’s Updated Compelling Evidence Rule Impacts Community Banks
3
Office of the Law Revision Counsel. 15 USC 1666 – Correction of Billing Errors
4
eCFR. 12 CFR 1005.11 – Procedures for Resolving Errors
5
Consumer Advice – FTC. Using Credit Cards and Disputing Charges
6
eCFR. 12 CFR Part 226 – Truth in Lending Regulation Z
7
Consumer Financial Protection Bureau. Submit a Complaint About a Financial Product or Service
8
Early Warning. Consumer Report
9
Office of the Law Revision Counsel. 15 USC 1693g – Consumer Liability
10
Consumer Financial Protection Bureau. Regulation E 1005.6 – Liability of Consumer for Unauthorized Transfers