Suppose your credit-card bill shows two charges for the same hotel stay. You contact the hotel. It promises to investigate. Three weeks pass, followed by another statement. At that point, the hotel may still be working on it—but the deadline for protecting your rights with the card issuer is continuing to run.
For many billing errors covered by federal rules, you need to get a written dispute to the issuer within 60 calendar days after it sent the first statement containing the error. The 60-day clock isn't measured from your first complaint to the hotel or the date you opened the statement. That's the detail most worth writing down.
Which kind of problem are you reporting?
There is a difference between an unfamiliar transaction, an incorrect amount, a payment the issuer failed to credit, and a purchase that simply disappointed you. The card company may handle these under different rules. For suspected unauthorized use of your card, report it immediately through the number on the card or the official app and follow the issuer's security instructions.
If it is a billing error—a duplicate charge, for example—gather the statement, transaction details, receipts and any messages with the merchant. You don't need a lengthy essay. You do need a precise description of the error.
Call, but don't rely only on the call
Calling is useful for getting a case number and finding out how the issuer categorizes the problem. It does not automatically substitute for a written billing-error notice. Your statement should identify where such notices must be sent. That address may differ from the regular payment address.
Your letter should include your name, account information sufficient to identify the account, the date and amount of the disputed charge, and why you believe the bill is wrong. Send copies rather than original receipts. Keep a copy of the notice, evidence of when it was sent and, when available, proof of delivery.
An example of a useful dispute letter
I am disputing a billing error on the statement dated [date]. It includes a charge of [amount] from [merchant] on [transaction date]. The charge appears twice although I made only one purchase. I have attached the receipt and a copy of the statement showing both entries. Please investigate and correct the duplicate amount.
A letter like this tells the issuer exactly what to look for. Avoid sharing full card details in ordinary email; use the permitted channel and the security instructions supplied by the issuer.
What about paying the bill?
For a qualifying, properly disputed billing error, you generally can withhold the disputed charge and related charges during the investigation. That does not excuse paying the rest of the bill. Continue meeting the deadlines for charges you are not disputing.
The issuer generally must acknowledge receipt of a proper written dispute within 30 days unless it resolves the problem sooner, and complete its investigation within the applicable two-billing-cycle limit, no more than 90 days. Those are legal process rules, not a guarantee that every disputed purchase will be refunded.
Keep one record instead of five scattered notes
Write the statement date, the notice deadline you calculated, the date you sent the dispute, the issuer's case number and each response. If the issuer finds no error, request and read its explanation. You should know why it thinks the charge is valid and what, if anything, is due next.
The Consumer Financial Protection Bureau's billing-error guide sets out the federal process. You can also submit a complaint to the CFPB if you believe the issuer mishandled your dispute. A complaint is not a replacement for sending a timely billing-error notice.
The safest habit: when a billing error appears, note the statement date immediately. You can continue discussing the problem with the merchant while you preserve your separate rights with the card company.
