For U.S. consumers, the first step is to identify what actually went wrong. Report an unauthorized purchase, withdrawal, or ATM error to your bank or credit union as soon as you notice it. For a covered electronic fund transfer, Regulation E generally requires the bank to receive notice no later than 60 days after it sends the statement that first shows the alleged error.

That 60-day period is not a universal debit-card chargeback deadline. An unauthorized transfer, an ATM dispensing problem, and an authorized purchase involving a missing refund may follow different procedures. Calling every complaint "fraud" or waiting for the merchant to respond can send the claim down the wrong path.

Quick answer

• Report an unauthorized transaction immediately. Do not wait for the monthly statement.
• Save the statement and record the date it was sent or made available.
• Describe the problem accurately: unauthorized transfer, wrong amount, duplicate transaction, ATM error, or merchant-performance problem.
• Give the bank a short timeline, transaction details, and the records that support it.
• Treat provisional credit as temporary until the investigation is finished.

Start with the payment type and the problem

Banks may use terms such as "error claim," "card dispute," or "unauthorized transaction investigation" instead of "chargeback." Ask which process has been opened and what deadline applies to it.

Regulation E does not automatically require a refund when goods are defective, a service is disappointing, or a merchant refuses to refund an authorized purchase. The bank may have a separate network or account-agreement process for those situations.

Common mistakes in debit-card complaints

1. Waiting because the 60-day period has not expired

The federal notice period generally runs from the statement date, not the purchase date. The bank must receive notice within 60 days after sending the statement on which the alleged error first appeared.

That does not make day 59 a sensible filing date. An unauthorized transfer can be followed by more transfers, and a lost or stolen card or other access device creates a separate liability concern. Report the issue when you find it.

2. Calling an authorized purchase "fraud"

An unauthorized transfer is one the consumer did not authorize. If you approved the purchase or gave someone permission to use the card, a later delivery, cancellation, or refund problem does not automatically turn the transaction into fraud.

A recurring charge after cancellation needs a careful explanation. Give the bank the original authorization, the cancellation date and method, the merchant's terms, and the charges that followed. Let the bank decide whether its network process or another procedure fits the facts.

3. Waiting for the merchant before notifying the bank

For an authorized purchase, a written refund request to the merchant may resolve the matter and produce useful evidence. It should not replace notice to the bank when the transaction may be unauthorized or the account record may be wrong.

Regulation E does not make a merchant denial a universal prerequisite to reporting an alleged error. If the transaction is suspicious, notify the bank first. Contact the merchant afterward if it is safe and useful.

4. Applying credit-card billing rules to a debit card

Debit-card disputes generally involve Regulation E and the Electronic Fund Transfer Act. Credit-card billing-error procedures generally involve Regulation Z and the Truth in Lending Act.

A Visa or Mastercard logo does not turn a debit transaction into a credit-card billing dispute. Liability rules, provisional-credit requirements, and investigation procedures can differ. Your bank may offer additional contractual protections, but do not assume that credit-card rights apply to the debit account.

5. Sending a notice that is too vague

"I don't recognize this charge" is a reasonable first alert, but the bank will need enough information to locate and evaluate the transaction. Include:

• The transaction date and amount
• The statement description
• The account's last four digits
• When you noticed the entry
• Why you believe it is an error
• Whether the card or other access device was in your possession
• The result you are asking the bank to provide, such as an investigation and written decision

For a wrong-amount claim, state what you authorized and what posted. For an ATM claim, state both the amount requested and the cash actually received.

6. Waiting for a receipt or discarding the records

Do not postpone notice because you cannot find a receipt. An unauthorized transaction often has no receipt in the consumer's possession.

Keep the statement, account alerts, order confirmations, delivery records, cancellation messages, refund promises, merchant emails, ATM receipts, and notes from calls with the bank. Save the originals. A clear timeline is usually more useful than a folder of unexplained screenshots.

7. Leaving out the ATM details

An ATM claim is easier to investigate when the bank can identify the particular machine. Record:

• The ATM address and identifying number
• The date and exact time
• The amount requested
• The amount actually received
• Whether the machine retained the card
• The bank or operator named on the machine
• Any error message or receipt

Report the debit promptly and ask for a case number. Do not assume the account will correct itself.

8. Ignoring a request for written confirmation

Oral notice can start the process, but a bank may require written confirmation of an oral notice within 10 business days. If it does, ask where the confirmation must be sent and follow that instruction.

Use the bank's secure message system, dispute form, or designated mailing address when available. Keep a copy of what you sent, screenshots or transmission records, and the date the bank received it. Do not send a full card number through ordinary email.

9. Spending provisional credit as if it were final

When a bank cannot finish its initial investigation within the usual period, Regulation E may require provisional credit while the investigation continues. That credit is temporary. If the bank later finds that no error occurred, it may reverse the credit after giving the required explanation.

Continue checking the account and keep every notice. A temporary credit is not the same as a final resolution.

10. Accepting a denial without checking the reason

A denial may reflect a factual mistake, a wrong dispute category, or missing evidence. Read the written explanation before deciding what to do next. Ask for the documents the bank relied on when the rule or the bank's notice gives you that right.

A follow-up should correct a specific omission or factual error. Do not change an accurate account of what happened into a different allegation simply because the first claim was denied.

A filing process that keeps the facts straight

1. Secure the account

For an unauthorized transaction, lock or replace the card through the bank's official app or phone number. Change a compromised PIN or password and ask whether other transactions are pending. The FTC's guidance on lost, stolen, and unauthorized cards also recommends reporting unrecognized withdrawals promptly and monitoring the account.

If the card is still in your possession, say so. That fact does not by itself prove that a transaction was authorized, but the bank will need to know whether someone could have used the card, PIN, mobile wallet, or online banking account.

2. Save the statement and note the dates

Keep the statement showing the transaction and record when the bank sent it or made it available. Also note when you first noticed the entry.

If the transaction has not appeared on a statement, report it anyway. Tell the bank that it is not yet on a statement and ask how the notice will be recorded.

3. Send a precise notice to the bank

For a possible Regulation E claim, a short written notice can identify the issue without adding speculation:

I am notifying you of an alleged error under Regulation E. On [date], my account ending in [last four digits] was debited $[amount] with the statement description [description]. The error is [unauthorized electronic fund transfer, incorrect amount, duplicate transaction, or ATM dispensed no cash or only $X]. I first noticed it on [date]. Please investigate and provide the result in writing. Attached are [documents].

Use the bank's designated dispute channel and ask for a case number. If the bank requires a mailed notice, send it to the address it provides. Keep a copy of the notice and proof of delivery.

For an authorized purchase problem, use neutral, factual language instead. Describe what you ordered, what the merchant promised, what went wrong, when you requested a refund, and how the merchant responded.

4. Contact the merchant when the problem is merchant performance

If you authorized the purchase but the merchant did not deliver, canceled a service, or promised a refund that never posted, make the refund request in writing. Include the order number and the relevant date. Keep the merchant's reply, or a record that it did not reply.

This step may help with a debit-card network dispute, but it should not delay notice to the bank about an unauthorized transfer or account error.

5. Put the timeline on one page

List the events in order:

1. The purchase or withdrawal date
2. The date the transaction appeared on the statement
3. When you noticed the problem
4. Any merchant contact
5. When you notified the bank
6. The case number and the bank department or representative
7. Each credit, reversal, letter, or follow-up

Send the documents that support those entries. Keep unrelated material out of the first submission so the central facts are easy to find.

Deadlines, investigation periods, and liability

The Regulation E error-resolution rule sets the main federal process for covered electronic fund transfer errors:

• The bank generally must receive notice within 60 days after sending the statement that first shows the alleged error.
• It generally must investigate promptly and determine whether an error occurred within 10 business days after receiving notice.
• If it cannot complete the investigation within that period, it may generally take up to 45 calendar days if it follows the rule's provisional-credit requirements.
• The rule permits longer periods in certain situations, including some new accounts, point-of-sale debit transactions, and foreign-initiated electronic fund transfers. Some investigations can extend to 90 calendar days.
• If the bank decides that no error occurred, it must provide a written explanation. Ask for the documents on which it relied if you need to evaluate the decision.

These are federal Regulation E time periods, not a universal deadline for a merchant refund or debit-card network dispute. Ask the bank for the network-process deadline in writing.

Liability can also depend on how quickly you report a lost or stolen access device. Under 12 C.F.R. section 1005.6, reporting within two business days after learning of the loss or theft generally limits liability to no more than $50. Waiting longer can increase potential liability to as much as $500. Failing to report an error within 60 days after the statement was sent can expose later unauthorized transfers to additional risk.

The two-business-day rule is tied to learning that an access device was lost or stolen. It is not a reason to wait on an unfamiliar transaction when the card is still in your possession. Report the transaction and explain what you know.

If the bank denies the claim

Use the bank's written explanation as a checklist:

1. Confirm whether the bank treated the matter as an unauthorized transfer, account error, ATM problem, or merchant dispute.
2. Request the documents relied on in reaching the decision, when applicable.
3. Identify specific factual errors, such as a wrong date, an ignored cancellation message, or an incorrect amount.
4. Send relevant new evidence with the short timeline.
5. Ask for a supervisor or formal reconsideration through the bank's complaint channel.
6. Keep the original case number and do not submit contradictory versions of the event.

If the bank did not accept your notice, missed the applicable investigation timeline, failed to explain the denial, or reversed provisional credit without the required communication, you can file a complaint through the Consumer Financial Protection Bureau complaint portal. A CFPB complaint can request a response and highlight a process problem, but it is not a guaranteed refund and does not replace timely notice to the bank.

Situations that need careful wording

A recurring charge continued after cancellation

Give the bank the original authorization, cancellation date, cancellation method, merchant terms, and every charge that followed. Ask whether the bank will use its debit-card network process or another procedure. The original authorization and the later cancellation are both relevant.

An online order was never delivered

Keep the order confirmation, promised delivery date, tracking information, merchant correspondence, and refund request. If you authorized the purchase, describe it as a delivery or merchant-performance problem rather than automatically labeling it fraud. The bank can tell you whether its network rules provide a dispute route.

The statement shows ACH, a wire, or a peer-to-peer payment

Not every withdrawal from a bank account is a debit-card charge. Tell the bank how the payment was initiated. ACH and some peer-to-peer transfers may be electronic fund transfers, but the applicable procedure may not be the same as a card-network dispute. Wire transfers have their own rules and risks.

No cash came out of the ATM

You can report an account debit even when the machine dispensed no cash. Give the bank the machine's location, time, identifying details, requested amount, and amount received. Keep the receipt or photograph an error message if appropriate, and ask for the case number.

Before sending the complaint, write down the statement date, transaction details, notice date, payment rail, and bank case number. Then use the bank's designated channel to submit an accurate reason and a concise file of supporting records.