A wrong charge on a U.S. credit card can be challenged under federal billing-error rules if you hit the notice deadline and include the right details. Waiting on the merchant is not the process.

Saw a charge you didn't make, or a delivery that never showed up?

The Fair Credit Billing Act, carried out through Regulation Z section 1026.13, is the rule that binds your card issuer. A store refund policy is optional goodwill. A network chargeback is the bank's separate fight with the merchant.

You still pay every undisputed line. The disputed amount is the only piece you can hold back after a proper notice.

What actually counts as a billing error

Not every unhappy purchase qualifies.

12 CFR 1026.13 treats these as billing errors: an unauthorized charge; a charge that is not identified as required; a payment or credit that never posted; a computational or accounting mistake; and a charge for goods or services you did not accept or that were not delivered as agreed. You may also request documentation or an explanation of an item.

A change of mind does not belong here. If the item works and matches the order, take that up with the merchant.

Unauthorized use is its own fact pattern. FTC guidance on lost or stolen cards says to report charges you don't recognize as soon as you find them.

For unauthorized credit-card use, federal law generally limits your liability to $50. Some issuers promise $0 as a company policy. Ask what they actually posted, not what the ad said.

The 60-day window

Your notice must arrive within 60 days after the issuer transmitted the first periodic statement that showed the error. That is a receipt deadline.

Call anyway if it looks like fraud. Get the card blocked. Write down the confirmation number.

Put the claim in writing, or through the issuer's accepted electronic channel, and send it to the billing-error address on the statement. That address is often not the payment address.

Keep a copy of everything. Certified mail with return receipt is slow and boring and it proves the date they got the letter, which is the date that matters if they later say they never heard from you.

Turns out many people only use in-app chat, never save the transcript, and then cannot show when the 60-day notice actually went out.

File it in this order

1. Check the statement date, merchant name, posted amount, and whether anyone in your household authorized it.
2. Call the number on the card to report fraud or a stolen card, then jot the date, time, and reference number.
3. Collect emails, tracking pages, cancellation confirmations, receipts, and a one-page timeline.
4. Submit the dispute in the app or by mail with your name, account number, the amount, the date, and why it is a billing error.
5. Pay every charge you are not disputing, on time.
6. Watch for written acknowledgment. The creditor generally must acknowledge your notice within 30 days of receiving it, unless it already resolved the error in that period, and must finish the investigation within two complete billing cycles after receipt, not later than 90 days.

Online filing is usually faster to confirm. Mail is easier to prove. You'll want both if the amount is large.

During the investigation

You may withhold the disputed amount and related finance charges once a timely notice is in. The creditor may not treat that withheld amount as delinquent just because you didn't pay it while they investigate.

You still owe the rest.

Temporary credits show up a lot on fraud claims. They are not a universal legal guarantee for every billing-error category. If the issuer later finds no error, it can reverse a temporary credit. Read the letter they send.

If they agree you were right, they must correct the account within the same resolution period.

What to attach

A police report can help on a stolen wallet. It is not required for every unauthorized charge.

For a foreign merchant, save the posted dollar amount. Skip the 40-page dump. Name your files so a stranger can follow them.

You'd be surprised how often the file is just a screenshot of the charge and a one-line note that says fraud, which isn't nothing, but it also isn't a timeline, and if the merchant later produces a delivery scan or an IP address the issuer may accept that unless you already explained why that scan does not match the porch, the date, or the person who was home.

Two processes people confuse

Your written billing-error notice is you invoking Regulation Z against the creditor.

A chargeback is the creditor pulling the payment back from the merchant through the card network. Reason codes and merchant reply windows are bank-to-bank mechanics. They are not extra rights the statute hands you.

Use the issuer's dispute button. Don't skip the facts the regulation expects: who you are, which account, which amount, and why it's an error.

To be honest, the app is the easiest place to grab a reference number the same day.

Some issuers investigate more of the claim internally. The federal acknowledgment rule and the 90-day outer limit still apply either way.

When they deny the dispute

Ask for the written explanation. Compare it to the documents you sent.

You can send more evidence and request another look. If the file is stuck, submit a complaint through the CFPB complaint portal. Credit cards are in scope. Companies generally respond in 15 days. You typically have 60 days to comment on that response.

The Bureau does not print you a refund. It often forces a documented reply. Court is a different tool, with its own costs. This is general consumer information, not a recommendation to file a lawsuit.

A plain sample letter

Keep it dry and specific.

[Your name]
[Your address]
[Date]

[Issuer name]
[Billing-error address from your statement]

Re: Account ending in [last four], billing error dated [transaction date] for $[amount]

I am writing to give written notice of a billing error on this account under the Fair Credit Billing Act and 12 CFR 1026.13.

The statement you transmitted on [statement date] includes a charge of $[amount] on [transaction date] to [merchant]. I believe this is a billing error because [it is unauthorized / the goods were not delivered as agreed / a payment was not credited / the amount is a computational error / the charge is not properly identified]. [Add two or three sentences of facts.]

Please investigate, correct any error, and credit related finance charges. I am withholding the disputed amount. Send written confirmation of your findings.

Attachments: [list].

[Your name]
[Phone]
[Email]

Pay the undisputed balance the same week you mail it.

Debit cards are a different statute

These steps are for credit cards under Regulation Z. Debit-card unauthorized transfers follow electronic fund transfer rules, with different timing and liability.

Do this before the statement cycle closes

Pull the PDF or paper statement tonight. Mark the first statement that shows the charge. If the card is at risk, call and freeze it. Then send the written notice with attachments, and keep paying everything else.

If you are already past 60 days on a billing error, still report fraud. The special investigation rights under the billing-error rule may no longer apply. Other issuer fraud procedures might.

Thing is, the merchant's "we'll look into it" email does not stop the 60-day clock at the bank.