What Happens When You Dispute a Transaction With Your Bank

When you dispute a transaction with your bank, you trigger a federally regulated investigation: the bank pauses or provisionally refunds the disputed amount, asks the merchant for evidence supporting the charge, weighs both sides, and then either makes the refund permanent or reinstates the charge with a written explanation. The rules, deadlines, and protections depend on whether you used a credit card or a debit card. The Fair Credit Billing Act governs credit card disputes; the Electronic Fund Transfer Act governs debit card and bank account disputes.¹²

What Happens to the Money Right Away

The first thing you’ll notice is that the disputed amount stops behaving like a normal charge, but the mechanism is different depending on your card type.

For a debit card dispute, the bank has to choose between two paths within 10 business days of your notice: finish the investigation entirely, or provisionally credit your account for the disputed amount and continue investigating. If it issues that provisional credit, it then has up to 45 days from receiving your notice to complete the case. During that stretch, the money sits in your account and you can use it. For accounts opened within the previous 30 days, the bank gets 20 business days rather than 10 before it has to issue provisional credit.²³

For a credit card dispute, there’s no provisional credit because you haven’t paid the money yet. Instead, your obligation to pay the disputed amount is suspended while the investigation runs. The issuer cannot charge you interest or penalties on that specific amount during the investigation, and it cannot report the disputed amount as delinquent to the credit bureaus. It may tell the bureaus a dispute is open, but it cannot treat your nonpayment as a missed payment. Even if the investigation later finds the charge valid and you pay within the time the issuer gives you, it still cannot report you as delinquent for that period.¹⁴

How the Investigation Works

Once your dispute is filed, the bank runs a formal investigation on a set clock. For credit card disputes, the issuer must acknowledge your notice within 30 days and resolve the case within two complete billing cycles, and never more than 90 days from receiving your notice. For debit card disputes, the clock is 10 business days, extended to 45 days if the bank issues provisional credit.¹²

Behind the scenes, the bank contacts the merchant’s payment processor and asks for documentation justifying the original charge. The merchant typically has 20 to 45 days to respond, depending on the card network’s rules, and may submit evidence such as signed receipts, delivery confirmations, download logs, or records tying the transaction to your known device or shipping address. Investigators compare the merchant’s evidence to yours.⁵

If the merchant misses its deadline, the bank generally rules in the consumer’s favor by default. If the merchant does respond with strong evidence, the bank weighs both sides. Neither party gets an automatic advantage; the decision turns on the evidence.

Filing Deadlines You Have to Meet

A dispute filed too late gets nowhere, so the deadlines matter as much as the process itself.

For credit cards, you have 60 days from the date your issuer sends the statement showing the error. The written dispute notice has to go to the specific billing inquiry address the issuer designates, not the general payment address. That address typically appears on your monthly statement or in your online account settings.¹

For debit card and bank account transactions, the same 60-day window runs from the statement date. Debit card disputes can be reported orally or in writing, though your bank may require written confirmation within 10 business days of a phone report.²

How Much You Could Owe on an Unauthorized Charge

If you’re disputing a charge you didn’t make, how fast you reported it drives how much you could be liable for, and the two card types work very differently.

Federal law caps your liability for unauthorized credit card charges at $50, no matter when you report them, as long as the charge occurred before you notified the issuer. Many issuers voluntarily waive even that $50 through zero-liability policies. Charges that appear after you’ve reported your card lost or stolen are not your responsibility at all.⁶

Debit card liability is tiered, and the numbers escalate quickly:

Report within 2 business days of learning about the loss or theft: your maximum liability is $50.
Report after 2 business days but within 60 days of the statement: your maximum liability rises to $500.
Report after 60 days from the statement: you can be liable for the full amount of unauthorized transfers that occur after the 60-day window, with no cap.

A two-day delay in reporting a stolen debit card can raise your exposure tenfold.⁷

What the Bank Needs From You

Your notice must give the bank enough to identify you and your account, describe the error, state the dollar amount, and explain why you believe an error occurred. For credit card disputes, qualifying billing errors include charges for items you didn’t receive, incorrect amounts, charges you didn’t authorize, and computational mistakes by the issuer.¹

Beyond the legal minimum, supporting evidence helps. Gather receipts, shipping confirmations, tracking numbers, screenshots of correspondence with the merchant, or photos of damaged goods. If you already tried to resolve the issue with the merchant, include records of that contact. A clear written explanation stating what you bought, what went wrong, and what the merchant said gives the investigator enough to decide without follow-up questions.

You can also dispute part of a transaction rather than the whole amount. If you received some but not all of the services you paid for, or if only part of the charge is wrong, contest just the disputed portion.

Most banks accept disputes through several channels: an online form in the banking portal, a button in the mobile app’s transaction history, a phone call, or a letter. For credit card disputes, a written notice to the billing inquiry address creates the strongest legal record because the Fair Credit Billing Act specifically references written notice. Keep copies of everything you send.¹

How the Case Ends

The investigation closes one of two ways.

If the bank rules in your favor, any provisional credit becomes permanent on a debit dispute, or the charge is permanently removed from your balance on a credit card dispute. The bank sends written notice that the case is closed and the funds are yours.

If the bank finds the original charge was valid, the debit card outcome is a reversal: the provisional credit comes back out of your account, and the bank must notify you in writing at least three business days before that happens. The written notice has to explain why the bank concluded no error occurred and tell you that you can request copies of the documents it relied on. On a credit card dispute, the issuer must similarly explain its reasoning in writing and may reinstate interest charges on the amount that were previously paused.²¹

If the Bank Sides Against You

A denial is not the end of the matter. You have a few ways to push further.

Ask for the bank’s evidence. On a debit card dispute, you have an explicit right to copies of the documents the bank used to decide. On a credit card dispute, you can request copies of the merchant’s evidence as well. Reviewing that material sometimes reveals factual errors or thin evidence worth challenging.²¹

File a complaint with the Consumer Financial Protection Bureau. The CFPB accepts complaints about banks and credit card issuers, creates a formal record, and requires the institution to respond.

Take legal action. For debit card disputes, federal law lets you sue in any federal district court or other competent court within one year of the violation. If the bank failed to follow proper investigation procedures, such as not provisionally crediting your account within the required timeframe, you may be entitled to triple damages. Small claims court is also available for lower-dollar disputes.⁸

One thing changes if you keep disputing a credit card charge after the issuer’s investigation concludes: the issuer can then report the amount as delinquent, but it must also note that you still dispute the charge.⁴

Disputes You Don’t Actually Believe In

The dispute process is built for genuine errors and fraud, not for reversing purchases you regret. A dishonest dispute, sometimes called friendly fraud, has real consequences. Your bank may close your account entirely if it suspects abuse. Merchants can refuse to sell to you again. In serious cases, a fraudulent chargeback can be treated as a form of wire fraud, which carries criminal penalties. Card networks may flag your account, which can lead to legitimate future transactions being declined. Banks and networks have gotten better at spotting patterns, and a history of unfounded disputes can put your ability to open accounts elsewhere at risk. File only when you genuinely believe an error or unauthorized charge occurred.

1
Office of the Law Revision Counsel. 15 U.S.C. 1666 – Correction of Billing Errors
2
Office of the Law Revision Counsel. 15 U.S.C. 1693f – Error Resolution
3
Consumer Financial Protection Bureau. 12 CFR 1005.11 – Procedures for Resolving Errors
4
Office of the Law Revision Counsel. 15 U.S.C. 1666a – Regulation of Credit Reports
5
Mastercard. How Can Merchants Dispute Credit Card Chargebacks
6
Office of the Law Revision Counsel. 15 U.S.C. 1643 – Liability of Holder of Credit Card
7
eCFR. 12 CFR Part 205 – Electronic Fund Transfers (Regulation E)
8
Office of the Law Revision Counsel. 15 U.S.C. Chapter 41, Subchapter VI – Electronic Fund Transfers