Start with the card issuer. Use the phone number printed on the back of the card or the issuer's official app. Avoid numbers supplied by an unexpected text or email. Before you call, write down the merchant, amount, posted date, and why the charge looks wrong.

Thing is, that call may create an internal case without locking in every federal billing-error right. Regulation Z generally requires written notice to reach the billing inquiries address on your statement within 60 days after the statement containing the error was mailed. See the Regulation Z billing-error rule.

These steps cover U.S. consumer credit cards. Debit cards, prepaid cards, bank transfers, and payment apps can follow different rules, and this is general consumer information, not legal advice.

Name the charge accurately

Pick the category before you call. The wrong label can slow the case.

A weird descriptor can be a billing alias rather than fraud. Check receipts, subscriptions, and authorized users before you label it. If it still isn't yours, report it promptly.

If you recognize the purchase, don't call it unauthorized because the seller made a mistake. Ask which dispute category fits.

Get ready before dialing

Mark the charge on your latest statement. Write down the exact merchant name, amount, posted date, and statement descriptor. Note when you first noticed the problem. Gather receipts, order confirmations, cancellation notices, delivery records, or merchant messages. Have the last four digits of the card ready and know whether the physical card is still with you.

Use a trusted phone number. Never give an unsolicited caller your PIN, password, or one-time login code.

If the card is missing, say so right away. The FTC advises consumers to report lost or stolen cards and unfamiliar charges as soon as they discover them. Its lost or stolen card guidance also recommends watching the account for additional activity.

Word-for-word phone script

Use this as a prompt, not a performance. Read slowly.

The representative will verify your identity. After that, say:

You: "Hello. My name is [full name]. I need to dispute a transaction on my credit card ending in [last four digits]. Please connect me with the disputes or fraud department."

Representative: "[The representative verifies your identity.]"

You: "The transaction appears as [statement descriptor]. It is $[amount], posted on [date]. I am disputing it because [it was unauthorized / the amount is wrong / a payment or credit was not posted / the goods or service were not provided as agreed]."

You: "I first noticed it on [date]. The relevant facts are [brief, factual timeline]. I contacted [merchant name] on [date] by [phone, email, or other method], and [state the response or say there was no response]."

Include the merchant-contact sentence only if it is true.

You: "I have copies of [list your documents]. What is the secure way to submit them?"

You: "Please open the appropriate dispute case and tell me how you are classifying it. I want the description to match what happened."

You: "What is the case number? Please also give me your name or representative ID, today's date, and the next expected step."

You: "Does your process offer provisional credit while you investigate? If so, when should it appear, and could it be reversed if the claim is denied?"

You: "Please confirm what I should pay while this is pending. I will pay the charges I agree I owe by their due dates."

You: "Please send written confirmation and the document-submission instructions. Does your team require a separate written billing-error notice at the billing inquiries address on my statement? I will send one if needed."

You: "Thank you. I have the case number and next steps. Goodbye."

Pause. Take notes.

If the representative says to contact the merchant:

You: "I understand. I will contact the merchant if appropriate. Please still record my report today and tell me the deadline for submitting documents or a written notice."

You don't need to say "chargeback." A chargeback is generally the issuer's network process. Your job is to describe the transaction accurately and provide evidence.

Short lines for common disputes

These can replace the main explanation.

Unauthorized transaction: "I did not make or authorize this charge. I still have the card" or "The card is missing." "Please explain the steps to block or replace it and report the transaction."

Wrong amount: "The receipt shows $[correct amount], but the card was charged $[charged amount]. I am disputing the $[difference] difference."

Missing payment or refund: "I made a payment or was promised a credit on [date], but the account still shows the amount as owing. I have the confirmation."

Non-delivery or service problem: "I paid $[amount] for [item or service] on [date]. It was not delivered or did not match the agreement. I contacted the merchant on [date], and the issue remains unresolved."

Recurring charge after cancellation: "I canceled the service on [date], and I have the cancellation confirmation. The charge posted afterward."

Keep it short. Let the evidence carry the detail.

Put the dispute in writing

A call creates a record. It may not trigger the full federal billing-error procedure.

Regulation Z requires a billing-error notice in writing and sent to the address the issuer provides for billing-error notices. That address can differ from the payment address. Use the one printed on your statement. Send it within the 60-day period.

The FTC sample dispute letter is a useful starting point. Adapt it:

Re: Billing error on account ending in [last four digits]

I am writing to dispute a charge of $[amount] from [merchant] posted on [date]. The error is [specific explanation]. I first noticed it on [date].

Please investigate and correct this error. Enclosed are copies of [list your documents]. Please send written confirmation of the result.

Sincerely, [Your full name] [Your mailing address] [Phone number or email]

Send copies. Keep the letter, documents, and delivery record. If you file through an app or secure message, ask whether that counts as the formal written billing-error notice.

Deadlines that control the case

The federal timeline is not the same as a representative's estimated refund date.

Turns out, the date you noticed the charge may not start the federal deadline. Find the first statement showing the error. Use its mailing date. The statement date is easy to miss, especially when the app shows a posted date that feels more real, but the federal clock generally looks back to the mailing date on the first statement showing the problem.

Ask about the issuer's internal evidence deadline. Card-network dispute procedures can have separate timing rules. Don't rely on a generic chargeback deadline found online.

While the issuer investigates

After the call, work this list:

• [ ] Save the case number, representative name or ID, date, and time.
• [ ] Submit documents through the method the issuer gave you.
• [ ] Send written notice to the billing inquiries address when required.
• [ ] Keep paying the undisputed portion of the account by its due date.
• [ ] Monitor the account for additional unauthorized charges and any provisional credit.
• [ ] Record the promised follow-up date and contact the issuer if it passes.
• [ ] If the card may be compromised, ask whether it should be blocked and replaced.

For a properly raised written billing-error dispute, Regulation Z generally lets you withhold the disputed amount during the investigation. You still owe the undisputed portion. Don't stop paying the whole account without understanding the consequences.

A provisional credit can be reversed if the issuer rejects the dispute. It isn't necessarily final.

Evidence that clarifies the claim

A strong file shows the charge you are challenging, what went wrong, and what you did to resolve it.

Your statement pins down the descriptor, posted date, and exact amount. A receipt or order confirmation shows the price, item, service, or agreed terms. Merchant emails or chat records can show your attempt to fix the problem and the seller's response. Shipping, delivery, return, cancellation, payment, or refund records fill in what happened after the purchase. A short written timeline helps too, because it keeps the order of events from blurring together during the call.

Exact dates, exact dollars, saved emails. A receipt showing the correct total, an email where the merchant promised a refund but never sent it, and a statement line with the wrong dollar figure can do more than a long phone conversation, because they let the reviewer see the mismatch without asking you to repeat the story.

Never edit screenshots to change dates or amounts. Guessing hurts too. If you are unsure, say so and explain what the records show.

If the issuer denies it

Read the written decision. Look for the stated reason, transaction details, and any deadline for asking the issuer to review the result.

Answer the actual reason. If the issuer says the merchant supplied delivery evidence, send the record showing a different address or failed delivery. If the amount is wrong, highlight the receipt and calculate only the disputed difference.

Ask what evidence the issuer considered and how to appeal. Keep the appeal tight. A short chronology with labeled attachments is easier to review than a long message repeating the phone call.

If you believe the issuer mishandled a timely written billing-error notice or failed to follow the required process, submit a complaint through the CFPB complaint portal. Include the statement, written notice, delivery proof, case number, correspondence, and denial. A complaint creates an escalation record. It does not guarantee a refund.

Mistakes that weaken the dispute

Calling an authorized purchase fraud is a bad start. If only one amount is wrong, dispute that amount instead of the whole balance. And if the 60-day written-notice deadline is approaching, don't wait on a merchant's refund promise.

To be honest, a calm, precise call beats a threat to contact a regulator. Get the case number and written process first. Escalate with documents if the issuer does not handle the matter properly.

Common questions

Phone-only disputes

You can call to report the issue and start the issuer's process. For a billing error covered by Regulation Z, send written notice to the billing inquiries address shown on your statement so the federal procedure is clearly invoked.

Provisional credit

Possibly. Some issuers provide provisional credit while reviewing a claim, but credit card billing-error rules do not create one universal 10-business-day credit promise. Ask whether the credit is provisional and whether it could be reversed.

Merchant contact

For a recognized purchase problem, contacting the seller may produce a faster refund and creates useful evidence. Don't wait so long that you miss the written dispute deadline. For an unauthorized charge, contact the card issuer promptly.

Debit cards

Not necessarily. Debit cards and other electronic fund transfers can follow different error-resolution rules. Call the bank or provider and ask for its debit-card dispute process instead.

Pull out your latest statement now. Circle the disputed line and write down its posted date. Call the number on the back of the card, then prepare the written notice before the applicable deadline.