Did a mystery charge pop up on your card statement?
To fix it, mail your card issuer a dated written billing-error notice that arrives within 60 days of the first statement date showing the mistake. Do not wait around. Attach receipts, keep a copy for your records, and pay whatever part of the bill you agree with.
Federal rules require the bank to confirm your letter within 30 days and finish its inquiry within 90 days, as noted in the FTC's guidance on using credit cards and disputing charges. Credit cards follow these rules; debit cards do not. This covers the U.S. consumer process, not legal advice.
Start with the payment type
The word chargeback gets thrown around casually. Yet different payment methods follow entirely separate rules. Know what you paid with before writing.
| Payment situation | Main process | First move |
|---|---|---|
| Credit card billing error | Federal billing-error rules plus issuer procedure | Send a written dispute promptly |
| Debit card or bank-account charge | Electronic transfer rules and bank error process | Notify the bank immediately |
| Merchant-side response | Card network, issuer, and processor procedures | Follow notice and submit evidence |
The FTC 60-day deadline applies to credit cards. It does not protect every electronic transfer.
Turns out, one transaction gets called three names depending on who is talking: a billing error on your statement, a chargeback in customer support, and a representment on the merchant side. It is the same charge, just different paperwork.
Decide whether this template fits
Use this letter when you can isolate one specific transaction and explain what went wrong. Maybe someone charged your card without permission. Maybe a merchant billed the wrong amount, charged you twice, ignored a return, or never delivered what you bought.
Fraud demands urgent action. Call the number on the card immediately. You can draft the letter later.
If you have a billing fight over a delivery or a promised refund, reach out to the seller first and keep their reply. That paper trail helps a lot. Even so, talking to the seller does not stop your dispute clock with the card issuer.
Copy and adapt this chargeback dispute letter
Swap out the bracketed details. Delete any text that does not apply to your case.
Subject: Written dispute of billing error - account ending in [last four digits]
Date: [Month Day, Year]
I am writing to dispute the following credit card transaction:
Merchant: [merchant name]
Transaction date: [date]
Amount: [$ amount]
Account: [last four digits]Reason for dispute: [unauthorized transaction, incorrect amount, duplicate charge, goods or services not delivered as agreed, or refund not posted]
The relevant facts are: [Describe what happened in date order. State what the merchant promised, what actually happened, and when you noticed the charge or problem.]
I contacted the merchant on [date] through [phone, email, chat, or other method]. The response was: [summarize the response, or state that no response was received].
I request that you investigate this billing error and correct the disputed amount. Please confirm receipt of this notice and tell me the result of your investigation.
I have attached copies of the records supporting my dispute. I will continue paying the undisputed portion of my account.
Sincerely,
[Full name]
[Mailing address]
[Phone or email]
[Account number or last four digits, as requested by the issuer]
Send this to the billing-dispute address on your statement. If you submit it through an online portal, download the confirmation screen right away. Never email full card numbers or security codes over standard email.
Build a clean evidence packet
A thick stack of papers will not save a weak claim. Instead, give the reviewer a clean, chronological file that makes the error obvious at a glance.
- [ ] The statement page showing the disputed charge.
- [ ] Merchant name, transaction date, amount, and last four digits of your card.
- [ ] A short timeline of the purchase, delivery, cancellation, or promised refund.
- [ ] Receipts, invoices, order confirmations, or signed contracts.
- [ ] Written messages, emails, or chat transcripts with the seller.
- [ ] Tracking numbers, shipping receipts, or return confirmations.
- [ ] Proof of an expected credit that never showed up.
- [ ] Any case or confirmation numbers from prior calls.
Arrange everything by date. Black out unrelated personal transactions on your statement so the examiner can focus on the item at issue.
Send it, then track the claim
Follow these steps in order:
- Check the statement date. Find the first bill showing the bad charge and count 60 days forward.
- Flag fraud right away. If someone stole your card info, phone the bank before sitting down to write.
- Ask the merchant for help. Get their cancellation policy or refund promise in writing if possible.
- Submit via official channels. Mail the letter or upload it through the bank's secure portal with attachments.
- Pay the rest of your bill. Always pay undisputed charges on time to protect your credit standing.
- Log every communication. Keep track of confirmation notices, phone calls, agent names, and final rulings.
Your card issuer has 30 days to acknowledge your written notice. It then has two complete billing cycles - up to 90 days - to wrap up the investigation. If you hear nothing after a month, call them with your tracking number ready.
Debit cards follow a different rule
Thing is, debit cards operate under a completely different federal framework. If you use credit-card wording on a checking account dispute, you might miss strict deadlines.
Under the current eCFR text for 12 CFR 1005.6, your liability caps out at $50 if you report a lost or stolen card within two business days of learning about it. Wait longer than two business days, and that ceiling jumps to $500.
If unauthorized charges slip past your review and you fail to notify the bank within 60 days of your statement, you risk unlimited liability for subsequent charges that happen after that window. Report debit errors the minute you see them.
What happens after you file
Once the issuer opens the case, the merchant gets an opportunity to defend the transaction. As outlined in Visa's chargeback overview, sellers can counter by submitting signed receipts, proof of delivery, or customer communications through their merchant processor.
Review any counter-evidence the bank shares with you. If the merchant insists a package arrived, verify the tracking delivery address against your home address. If they claim they refunded you, check your bank statement to see if that money actually landed.
Limits that matter
Late notices kill claims. Send your written dispute early rather than waiting until day 59.
Moving house also triggers an unexpected technical hurdle. Under FTC rules, if you moved recently, the card issuer must have received your written change of address at least 20 days before that billing period closed.
Merchant policies matter, but they are not the law. A seller's posted return policy provides context, yet it never guarantees the issuer will take your side. Also, remember that network chargeback deadlines for merchants and banks run on separate internal clocks from your personal 60-day legal window.
If the issuer denies the dispute
Read their denial letter closely before firing off an angry response. Call the issuer to ask which document was missing and what deadline governs an appeal.
To be honest, submitting a fresh one-page timeline that directly refutes the merchant's claim works ten times better than re-sending the same narrative with more emotional language, especially when you are pressed for time and just want your money back. Stick strictly to the facts.
Pull your first statement right now, calculate your 60-day cutoff, and mail your letter today.