Start with the merchant if it will refund you. Go straight to the card issuer when the charge was not authorized, the amount is wrong, or you paid for goods or services that never arrived.

For U.S. consumer credit cards, a written billing-error notice generally must reach the issuer within 60 days after the first statement containing the error was sent. That is not the same as a store return window, and card-network chargeback deadlines can differ. If the 60-day period is almost up, don't wait for a merchant reply.

Refund or chargeback: which one fits?

A merchant refund is voluntary. The seller agrees to return all or part of the payment and sends a credit to the card. For approved returns, cancellations, duplicate payments, and ordinary customer-service fixes, this is usually the fastest route.

A chargeback is a formal dispute handled by the card issuer and card network. The issuer reviews the claim and may reverse the transaction if the facts and applicable rules support it. It isn't an automatic refund, and both you and the merchant may be asked for evidence.

Many issuers call any formal dispute a chargeback, but a federal billing-error claim has its own notice rules. The Federal Trade Commission's guidance on using credit cards and disputing charges explains the written process.

Don't turn a chargeback into a return counter

A store's return policy controls ordinary regret. Disliking a product, missing a cancellation date, or deciding later that a service wasn't worth the money doesn't make the charge a billing error.

Be accurate. Labeling a denied return as fraud can weaken your claim and may trigger an account review. If the merchant failed to deliver, charged you twice, or didn't post an approved refund, describe that specific failure.

Unauthorized charge: act fast

If a posted charge is unfamiliar:

1. Check the details. Merchant descriptors can look odd, and a pending authorization may drop off. Confirm whether another authorized user made the purchase.
2. Use a trusted issuer channel. Call the number on the back of the card or use the issuer's official app or website. Don't rely on a link in a text or email.
3. Secure the account. Follow the issuer's instructions on locking, replacing, changing credentials, or reviewing recurring payments.
4. Keep the report details. Save the date, time, case number, and confirmation.
5. Look for other charges. Report each unauthorized transaction unless the issuer says one report covers all of them.

You don't need to chase a suspicious merchant before reporting fraud. If the charge is still pending, the issuer may ask you to wait until it posts before opening a formal billing dispute, but report the suspected fraud now.

These steps apply to U.S. credit cards. Debit cards, prepaid cards, bank transfers, payment apps, and peer-to-peer payments can follow different procedures.

How to dispute a billing error

1. Pin down the exact problem

Write the transaction date, amount, merchant descriptor, statement date, and reason for the dispute. Covered examples include an unauthorized charge, wrong amount, duplicate posting, undelivered goods or services, a missing promised credit, or a payment the issuer applied incorrectly.

A quality complaint or not-as-described issue may be handled under the merchant's policy or a card-network category rather than the federal billing-error procedure. Ask the issuer which category fits.

2. Try the merchant when it can fix the issue

For a missing refund, duplicate charge, canceled order, or delivery failure, send a short written request. Include the order number, transaction date, amount, and the fix you want. Ask whether the merchant approved a refund, the amount, the date submitted, the reference number, and the posting method.

A phone call may work, but follow up by email or the merchant's message system. Contacting the merchant can be faster, but it doesn't excuse missing the issuer's deadline. For fraud, report to the issuer first.

3. Send the dispute in the issuer's required form

Issuers often provide an app button, online form, or phone process. Use the issuer's channel, but if you want federal billing-error protections, make sure the notice is written and reaches the right address.

Mail or upload the notice to the billing-inquiries address on the statement, not the payment address. It should reach the issuer within 60 days after the statement with the error was sent. Use trackable delivery if mailing, and keep copies.

Include:

• Your name and account identifier, often the last four digits
• Transaction date, amount, and merchant name shown on the statement
• A clear description of the error
• Date and method of merchant contact, if any
• The credit or correction you want
• Copies of evidence, not originals

An app confirmation may be convenient, but it may not prove a qualifying written notice. If the deadline matters, ask how to submit in writing and save proof of receipt.

4. Pay the undisputed part

During a covered billing-error investigation, FTC guidance says you generally don't have to pay the disputed amount or related finance charges. Pay the rest of the bill by the due date.

If the dispute affects the minimum payment, ask how the account should be handled. A temporary credit is not necessarily the final answer.

5. Answer follow-up requests with a short timeline

The issuer may ask for receipts, tracking, return confirmation, cancellation proof, or an explanation. Reply by the deadline and keep proof of submission.

A clean timeline usually beats a pile of screenshots:

• Date: what happened
• Date: merchant contact
• Date: merchant promise or refusal
• Date: charge or missing credit appeared
• Date: request to issuer to correct

6. Check the final credit

If approved, confirm the credit is permanent and related charges were handled. If only part was approved, compare it with your loss.

If denied, read the reason. Appeal or ask for reconsideration by the issuer's deadline, and answer the specific reason with new or clarified evidence.

Evidence that helps

Evidence should show what you bought, what was promised, what failed, and what you did next.

If tracking says delivered but no package arrived, say so and include any carrier or merchant case number. The FTC's guidance on goods you never received or unordered products covers billing errors in these situations.

For a product complaint, explain the gap between what was advertised and what arrived. Don't exaggerate the defect or omit that you used the product. If the merchant issued a partial refund, dispute only the balance.

Written billing-dispute template

Adapt this notice. Follow the issuer's instructions and attach copies of your evidence.

Subject: Billing-error notice for [merchant] charge

I am disputing a charge on my credit card account.

Account: [last four digits] Merchant: [name as shown on statement] Transaction date: [date] Amount: $[amount]

The error is: [unauthorized charge, incorrect amount, goods not received, duplicate charge, or refund not posted].

The facts are: [brief factual explanation].

I contacted the merchant on [date] by [method]. The result was [no response, denial, promised refund, or other result].

Please investigate this billing error and credit the disputed amount as appropriate. Attached copies: [list of documents].

Name: [name] Address: [billing address] Phone or email: [contact information] Date: [date]

Don't include your full card number in an email unless the issuer specifically requires it through a secure channel.

Deadlines and investigation limits

The federal deadline and card-network deadline are not always the same.

The 60-day clock runs from the statement containing the error, not necessarily from the purchase date or the day you noticed it. If shipping was delayed, contact the issuer promptly and ask whether an extension or another dispute category applies.

The FTC also points to an address rule in certain cases: if you changed your address, the issuer generally must have received the written change at least 20 days before the billing period ended. Update your address promptly and follow the instructions on your statement.

If the merchant or issuer says no

A merchant refusal doesn't end the issuer's review. Send the merchant's reply to the issuer, explain why it doesn't fix the problem, and attach key records.

If the issuer denies the claim:

1. Read the reason and appeal deadline.
2. Ask for a written explanation if it isn't clear.
3. Rebut each point with specific evidence.
4. Add delivery records, refund confirmations, listings, or cancellation proof.
5. Ask about reconsideration or appeal.
6. Keep paying undisputed amounts and watch future statements.

If the issuer missed the acknowledgment or resolution timetable for a written billing-error notice, give the dates to the complaint or escalation team. Keep the original notice, proof of delivery, responses, and statements. If the issue remains unresolved, you can also file a complaint with the Consumer Financial Protection Bureau.

If the merchant refunds after you dispute, tell the issuer. You shouldn't receive two recoveries for the same amount.

Mistakes that weaken disputes

• Letting the 60-day written-notice window pass while waiting for the merchant
• Assuming an odd descriptor is fraud without checking
• Calling a return disagreement an unauthorized charge
• Disputing the whole amount when only part is wrong
• Sending evidence without a short explanation
• Mailing to the payment address instead of billing inquiries
• Ignoring information requests
• Skipping undisputed charges
• Keeping both a merchant refund and issuer credit without telling the issuer

Find the statement with the error, note the date it was sent, and gather the order, receipt, tracking, or fraud report. If the charge is unauthorized, contact the issuer now. If it's a billing error and the 60-day window is close, submit written notice to the billing-inquiries address before the deadline.