Yes. Credit card companies do investigate disputes, and they are legally required to. Under the Fair Credit Billing Act, an issuer that receives a proper written dispute notice must conduct a reasonable investigation and reach a resolution within two complete billing cycles, and never more than 90 days.1Office of the Law Revision Counsel. 15 USC 1666 – Correction of Billing Errors How deep that investigation goes depends on the dollar amount, the category of dispute, and what evidence you and the merchant put in front of the investigator.
What the Investigation Actually Involves
Once your issuer has your dispute in hand, two tracks start running at the same time: an internal review of your account and a chargeback chain with the merchant.
On the internal side, the bank pulls your account history and looks for patterns. An investigator checks whether the charge fits your normal spending, whether the merchant is one you’ve used before, and whether you’ve filed similar disputes in the past. Repeat disputes or a pattern of challenging transactions you actually made (sometimes called “friendly fraud”) affect how the investigator weighs your claim. Banks are not naive about this, and the industry estimates that a significant share of chargebacks involve some element of first-party misuse rather than genuine fraud.
On the merchant side, your issuer sends a chargeback notification through the card network to the merchant’s acquiring bank. The merchant then has a defined window to respond with evidence defending the charge. For an online purchase, that evidence might include the IP address used to place the order, delivery confirmation with a matching address, or proof that you logged into your account and completed the transaction. For an in-person purchase, a signed receipt or chip-read transaction record carries weight. If the merchant doesn’t respond within the network’s deadline, the dispute typically resolves in your favor by default.
The investigator then weighs both sides. If the merchant’s evidence rebuts your claim, the issuer may side with the merchant. If the merchant can’t produce documentation, or the documentation doesn’t answer your specific complaint, the resolution usually favors you.
What You Have to Do to Trigger the Investigation
The 60-day filing rule is where most people lose their rights without realizing it. You have 60 days from the date your issuer sends the statement containing the error to submit a written dispute notice. Miss that window, and the bank has no legal obligation to investigate, even if the charge is obviously wrong.1Office of the Law Revision Counsel. 15 USC 1666 – Correction of Billing Errors
The notice must be written. A phone call to customer service doesn’t satisfy the statute, though most issuers treat an online dispute submission through their portal as the equivalent of a written notice. For ironclad protection, send a letter to the billing inquiry address on your statement and keep a copy.
Your notice needs four things: your name and account number, the date and dollar amount of the charge, the name of the merchant, and a clear explanation of why the charge is wrong.1Office of the Law Revision Counsel. 15 USC 1666 – Correction of Billing Errors The reason matters because it sorts your claim into a category of billing error. Federal law covers unauthorized charges, charges in the wrong amount, charges for goods or services you never received, and accounting errors on the statement.
Attach whatever evidence you have. Receipts, shipping records, emails with the merchant, screenshots of a canceled order, or proof of a return all strengthen the case. A dispute filed with nothing but “I don’t recognize this charge” can still succeed, but it leaves you exposed if the merchant pushes back.
One point that trips people up: you don’t have to contact the merchant first before filing a billing error dispute. The CFPB’s regulatory commentary makes this explicit for disputes involving goods or services that weren’t delivered as agreed.2Consumer Financial Protection Bureau. 12 CFR 1026.13 – Billing Error Resolution Reaching out to the merchant sometimes resolves things faster, but it isn’t a legal prerequisite for a billing error claim. Quality-of-goods disputes under a separate section of the law (ยง1666i) do require a good-faith attempt with the merchant first and carry additional dollar and geographic thresholds, so if your complaint is that the item arrived but wasn’t as described, the rules are tighter than the billing error track described here.3Office of the Law Revision Counsel. 15 USC 1666i – Assertion by Cardholder Against Card Issuer of Claims and Defenses Arising Out of Credit Card Transaction
The Deadlines the Bank Has to Meet
Federal law puts hard clocks on the issuer. After receiving your written dispute, the bank must send a written acknowledgment within 30 days. It then has two complete billing cycles to finish the investigation, with an absolute outer limit of 90 days from when it received your notice.4eCFR. 12 CFR 1026.13 – Billing Error Resolution These are ceilings, not targets. Many straightforward disputes wrap up in a few weeks.
If the issuer finds the charge was an error, it must correct your account and credit back any finance charges that accrued on the disputed amount. If it finds the charge was valid, you get a written explanation, and the original charge is reapplied along with any interest that built up.
Your Rights While the Investigation Runs
While the investigation is open, you can withhold payment on the disputed amount and any related finance charges. The issuer cannot try to collect that portion or require you to pay it.4eCFR. 12 CFR 1026.13 – Billing Error Resolution
You still owe the undisputed portion. If your bill is $2,000 and you’re challenging a $300 charge, the remaining $1,700 needs to be paid by the due date or you’ll face late fees and interest on that balance.4eCFR. 12 CFR 1026.13 – Billing Error Resolution Missing a payment on the undisputed portion gives the issuer full grounds to report you as delinquent regardless of the dispute.
Your credit report is also protected during the investigation. The issuer cannot report the disputed amount as delinquent to the credit bureaus or threaten to damage your credit rating because you challenged the charge.5Office of the Law Revision Counsel. 15 USC 1666a – Regulation of Credit Reports It can note to the bureaus that a dispute is open, but that notation alone should not hurt your score.
If the Bank Sides Against You
A denial is not the end. When the issuer concludes the charge was valid, it must explain its reasoning in writing and, if you ask, provide copies of the documents it relied on.1Office of the Law Revision Counsel. 15 USC 1666 – Correction of Billing Errors Read that explanation carefully. Merchant rebuttal evidence often has clear gaps you can counter.
You have at least 10 days after receiving the determination to respond in writing with additional evidence and reassert that the amount is in dispute.5Office of the Law Revision Counsel. 15 USC 1666a – Regulation of Credit Reports Doing so keeps the credit reporting protections partially in place: the issuer can now report you as delinquent, but must simultaneously note the amount is disputed and tell you which bureaus received the report. Once the matter is finally resolved, the issuer must promptly update every bureau it previously notified.
If you believe the bank itself failed to follow the required procedures, you can file a complaint with the Consumer Financial Protection Bureau online or by calling (855) 411-2372. The CFPB forwards your complaint to the company, which typically must respond within 15 days, and you then get 60 days to review the response.6Consumer Financial Protection Bureau. Learn How the Complaint Process Works Complaints don’t guarantee a reversal, but the bureau tracks patterns and can act on them.
Procedural failures also carry a direct penalty. A creditor that doesn’t follow the billing error procedures forfeits the right to collect the disputed amount and any finance charges on it, capped at $50, even if the charge itself turns out to be legitimate.1Office of the Law Revision Counsel. 15 USC 1666 – Correction of Billing Errors Larger damages are available through a civil suit under the Truth in Lending Act, which allows actual damages, statutory damages between $500 and $5,000 for open-end credit accounts, and reasonable attorney’s fees.7Office of the Law Revision Counsel. 15 USC 1640 – Civil Liability
When Network Rules Do the Work Instead
Beyond the federal framework, the major card networks run their own fraud guarantees. Visa’s zero-liability policy says you won’t be held responsible for unauthorized transactions on your card, whether it was lost, stolen, or used fraudulently.8Visa. Zero Liability Mastercard and the other networks have similar policies, and they often go further than the FCBA because they don’t impose a 60-day written notice requirement for fraud claims.
These policies are voluntary, not statutory. They exclude certain commercial cards and anonymous prepaid cards, and they expect you to have used reasonable care in protecting your card. When both a network policy and the FCBA apply, you get the benefit of whichever offers stronger protection. For clean fraud cases, the network route is usually faster. For billing errors and quality disputes, the statutory framework is what gives your claim legal force, and it’s the framework that requires the bank to actually investigate.