Report a transaction you truly did not authorize promptly. The bank or card issuer can investigate and may recover the money. A prompt report may also help stop more activity.
An unfamiliar line on a statement isn't automatically fraud. Turns out, merchant descriptors get shortened, subscriptions renew, and someone in the household may have used the account. Check those possibilities if the deadline isn't close.
People often call a complaint, a fraud claim, and a chargeback the same thing. They aren't. The bank or card issuer handles the transaction dispute; a regulator complaint is a later escalation if that process is mishandled. Use the payment rail to choose the process.
This information is for U.S. consumers. It isn't legal advice.
First, identify the transaction
The payment rail controls the deadline and route. Start there.
| What happened | Correct starting route | What to do |
|---|---|---|
| You did not make or authorize a credit card charge | Unauthorized-use or billing-error dispute | Contact the card issuer promptly and use the written billing-error process |
| You did not authorize a debit card purchase, ATM withdrawal, or electronic transfer | Regulation E error or unauthorized-transfer claim | Notify the bank immediately, especially after a lost or stolen card |
| The charge is from a known merchant but has the wrong amount or appears twice | Billing error or merchant dispute | Contact the merchant and issuer using the correct billing-error category |
| You once authorized a subscription or payment | Cancellation, refund, or recurring-billing dispute | Ask the merchant to cancel or refund it; don't describe an authorized payment as fraud |
| The payment was a wire, gift card, cash transaction, or some peer-to-peer transfer | Provider-specific process and possibly different law | Report it to the provider and bank immediately |
Check receipts, order emails, household accounts, and subscriptions before choosing the fraud route. Move faster if a reporting deadline is close.
If another person had permission to use the account, say so plainly. Shared credentials and authorized users can change the issuer's assessment.
The legal rule depends on how the money moved
Credit cards and deposit accounts follow different federal systems. The payment method matters.
Credit card charges
With a credit card, the Fair Credit Billing Act, or FCBA, generally gives you 60 days from the statement date to send written notice of a billing error, including unauthorized use.
Use the billing-inquiries address. It may not be the payment address.
Federal law generally limits liability for unauthorized credit card use to $50. An issuer may promise zero liability, but that is a separate account policy.
Phone support can open the case. Ask where formal notice belongs, and keep proof that you sent it.
Debit cards and electronic transfers
Regulation E covers many unauthorized electronic fund transfers from consumer deposit accounts. Debit purchases and unauthorized ATM withdrawals often fit within it.
A lost or stolen access device creates a shorter clock. The two-business-day window starts after you learn of the loss or theft. If you notify the financial institution within that period, liability generally cannot exceed the lesser of $50 or the unauthorized transfers made before notice.
Miss that window, and the possible cap can rise. The rule then uses the lesser of $500 or an amount calculated from the transfers covered by its formula. Two clocks can matter.
If an unauthorized transfer appears on a statement, notify the bank within 60 days after the statement is sent. Waiting longer can leave you responsible for later transfers that earlier notice might have prevented.
The CFPB's Regulation E liability rule and the current eCFR text spell out these liability rules. The FTC's guidance on lost or stolen cards also recommends quick reporting and written notice.
Card-network procedures may give an issuer a separate processing window. They don't replace your duty to notify the bank or issuer quickly.
Filing can help, but it has tradeoffs
Filing can recover money, create a timeline, and give the institution a chance to block more activity. The process can also disrupt your routine.
Thing is, an investigation takes time. A temporary credit can disappear.
| Potential benefit | Practical downside |
|---|---|
| Possible recovery of the disputed amount | The claim can be denied or the credit can later be reversed |
| A chance to stop additional fraudulent activity | The issuer may cancel the card, reset access, or restrict some transactions |
| A documented report of the incident | You may need to provide written details and supporting records |
| Protection under FCBA or Regulation E when the rules apply | Deadlines and notice requirements can affect your rights |
| A dispute itself is generally not a negative credit event | Missing payments on the undisputed balance can hurt your credit |
There is no reliable universal 80-90% success rate for these claims. Payment type, reporting date, evidence, and the authorization finding all matter.
Provisional credit is not a final win. Keep checking until the issuer closes the case.
Do you need to contact the merchant?
You don't have to contact the merchant before notifying your bank. If a deadline is near, call the issuer first.
A merchant may fix a duplicate, wrong amount, unclear descriptor, canceled service, or delayed refund. Keep that conversation separate from the bank's formal notice. Don't let it delay the notice.
How to file the dispute
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Secure the account. Lock the card in the banking app if possible. Call the official number on the card or statement. Report a lost or stolen card, change exposed passwords, and turn on multifactor authentication.
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Record the facts. Write down the transaction date, amount, merchant description, account, and statement date. Note when you spotted it and when you first reported it.
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Describe the problem accurately. Tell the bank that you did not authorize the transaction. Ask whether it will be handled as a credit card billing error or a Regulation E electronic-transfer error.
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Get a record of the report. Request a case number and ask how to submit documents, whether written confirmation is required, and where formal notices must go. Record the representative's name and the call date.
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Send the required notice. For a credit card, write to the billing-inquiries address with your name, account number, transaction date, amount, and a clear explanation. For a debit account, follow the bank's instructions and confirm an oral report in writing if the bank asks you to do so.
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Add useful evidence. Include merchant messages, receipts, cancellation records, account-security details, or a police or identity-theft report when relevant. Don't wait for a police report before making the initial bank report.
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Watch the account. Look for more transactions, provisional credits, requests for information, and the final decision. The bank may reverse a provisional credit after its investigation.
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Pay the undisputed credit balance. Don't stop paying the whole card bill because one charge is under review. Follow the issuer's written instructions.
Records worth keeping
Keep the records. Save the email, screenshot the account, and note the time - all of it can matter later, especially if the merchant and bank describe the same transaction differently.
Useful documents include:
- A statement or screenshot showing the transaction
- The dates you noticed and reported it
- Emails or messages with the merchant
- Proof of a lost or stolen card report
- Evidence of account-security steps, such as password changes
- A police or identity-theft report when theft or impersonation is involved
Never send your full password, PIN, or one-time authentication code to someone who contacts you. Use the number on your card or statement instead.
What happens after you file?
Credit card billing errors have a defined written-notice timetable. After receiving proper notice, the issuer generally must acknowledge the dispute within 30 days. It must resolve the matter within two complete billing cycles, and no later than 90 days.
Regulation E uses a different clock. The bank generally has 10 business days to investigate or must provide provisional credit when it needs more time, subject to exceptions and required notices. That credit can be reversed later.
To be honest, a temporary credit can feel like a refund. Wait for the final decision.
The issuer may ask for more details. Respond promptly. Keep copies of everything you send.
Can filing freeze the account or hurt your credit?
Filing a dispute does not trigger a standard 90-day freeze. A bank may block the card, reset online access, or restrict certain transactions while it reviews the activity.
Your card may stop working, automatic payments may be interrupted, or access to funds may change. Ask how you'll pay bills, reach unaffected accounts, and receive a replacement card.
Filing alone isn't a late payment or derogatory credit entry. The separate risk is failing to pay the part of the bill that isn't disputed. Pay that amount.
What if the bank denies the claim?
Read the denial reason first. The bank may have treated the matter as a merchant disagreement, found that notice was late, or concluded that the evidence showed authorization.
Ask for the reason in writing and request the records the bank relied on. Correct factual errors, send focused evidence, and use the issuer's appeal process. Report new unauthorized transactions separately.
If the bank still mishandles the matter, file a complaint with the CFPB or the appropriate banking regulator. That may prompt another review, but it doesn't guarantee a refund or replace the issuer's dispute process.
A qualified consumer attorney or legal aid office may be worth contacting after a large loss, identity theft, or repeated denial of a well-documented claim.
Common questions
Is an unfamiliar charge automatically unauthorized?
No. It could be a shortened merchant name, a recurring payment, a delayed posting, or a purchase by someone you authorized.
Check the details promptly. If the charge still doesn't match anything you approved, report it.
Does a dispute affect my credit score?
Usually not by itself. Filing the dispute generally doesn't create a negative credit entry.
A missed payment on the undisputed part of a credit card bill is a separate problem.
Can the bank take back a provisional credit?
Yes. Provisional credit is temporary while the bank investigates. Don't treat it as permanent until the issuer confirms that the case is closed.
Do I need a police report?
Not always. A report may support a theft or identity-theft claim, but it usually shouldn't delay your notice to the bank.
Ask whether the issuer needs one for your case.
What if I authorized the payment but the merchant broke its promise?
Use the merchant's refund or cancellation process and describe the actual problem accurately. Depending on the facts, it may be a billing error or service dispute rather than unauthorized use.
Your next move
Write down the transaction date, statement date, amount, and the day you noticed it. Contact the bank or card issuer today through an official channel, send any required written notice, and save the confirmation number. Keep paying the undisputed part while the case is open.