LetterAgent
Mail physical letters by just asking your AI assistant.
Home > Guides > Fax a credit card dispute
Yes, you can fax a credit card dispute letter in the US. The Fair Credit Billing Act requires written notice sent to the creditor's billing-inquiries address, not the payments address, within 60 days of the statement's mailing date. A fax with a transmission report counts as written notice, though certified mail gives you a proof-of-delivery paper trail that a fax does not.
| Rule | What it means for you |
|---|---|
| Written notice required | A phone call alone does not trigger FCBA protections. You must send it in writing: letter, fax, or the creditor's online dispute form if they accept one. |
| 60-day window | The clock runs from the date the statement was mailed to you, not the purchase date and not the due date. Paper or electronic, the mailing date is the trigger. |
| Billing-inquiries address | Your statement lists a separate address for billing inquiries. Disputes sent to the payments address can be ignored for FCBA purposes. |
| What the dispute must include | Your name and account number, the dollar amount in question, and a short statement of why you think it is a billing error. |
| Creditor's response duties | They must acknowledge your dispute within 30 days and resolve it within two billing cycles. You may withhold the disputed amount (not the rest of the bill) while it is investigated. |
This is general information, not legal advice.
This is the part people get wrong most often. Almost every card statement prints two addresses: one for payments, one for billing inquiries or errors. If you send your dispute to the payments address, the creditor is within its rights to treat it as ordinary correspondence, and your FCBA rights may not kick in. Find the inquiries address on your statement, the card issuer's website, or the back of your card, and address the fax to that office specifically.
The law was written in the 1970s, so it says "written notice" and leaves the medium open. Letters, faxes, and online dispute forms the creditor provides all satisfy it. What matters is that the dispute is in writing, reaches the right address, and arrives inside the 60-day window. Some issuers steer you toward their online form, and that is fine, but a written letter or fax works regardless of whether the issuer prefers it.
A fax gives you something certified mail does not: a transmission report with an exact timestamp, which pins down the date you sent the dispute. That is useful when the 60-day deadline is tight. The weakness is proof of receipt: a transmission report shows your machine connected to their number, not that a human read the letter. Certified mail with return receipt gives you a signed delivery record instead. For a large disputed amount, some people send both: fax for speed, certified mail for the paper trail. Keep your transmission report and a copy of the letter either way.
The 60 days run from the date the billing statement containing the error was mailed to you, not from when you opened it, not from the transaction date, and not from the payment due date. For paperless statements, the date the statement was made available in your account is the practical equivalent. Because the window is tighter than most people assume, a dispute faxed or mailed on day 58 still counts, but one sent on day 62 does not. If you are close to the deadline, fax beats mail: it arrives the same day, and the transmission report documents exactly when.
Canada has no single equivalent of the FCBA; card-issuer dispute rules come from the card network (Visa, Mastercard) and the issuer's agreement. Faxing a dispute letter to a Canadian issuer is still a legitimate way to put your complaint in writing, but the 60-day federal deadline and the billing-inquiries-address rule are US-specific. Check your cardholder agreement for the issuer's stated deadline and address.
Keep it short and factual: your name, account number, the statement date, the charge amount and date, and one sentence saying why you believe it is a billing error (unauthorized charge, wrong amount, goods not delivered, and so on). Attach anything that backs the claim, such as a receipt showing the correct amount. Sign it, keep a copy, and note the fax number and time on your copy.
Ready to fax it? Fax with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is sent.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com