A wrong amount, a duplicate swipe, a canceled order that still billed, or a charge you do not recognize is not something you have to “work out later.” For many open-end consumer credit cards, the Fair Credit Billing Act (FCBA) sets billing-error rules, including a window to write the card issuer and protections while the dispute is investigated.
BNPL apps and some store installment plans may use different contracts. Start with the card network path when a Visa, Mastercard, American Express, or Discover card funded the purchase.
What usually counts as a billing error
FCBA materials (and CFPB explainers that point consumers there) commonly cover problems such as:
- Charges you did not authorize (full unauthorized-use path: Unauthorized card charges)
- Wrong amounts or dates
- Charges for goods or services not delivered as agreed
- Math errors on the statement
- Failure to post payments or credits correctly
- Statements mailed to the wrong address after you notified a change in writing
A change of heart (“I no longer like the sofa”) is a merchant return problem first, not automatically an FCBA billing error. Returns on financed purchases have extra traps; see Returns, refunds, and warranties when you financed and keep the merchant’s return window on your calendar.
The 60-day clock (and why speed matters)
For many FCBA billing-error disputes, you generally must notify the issuer in writing so it arrives within 60 days after the first statement that showed the error was sent. Phone calls help for fraud freezes; written notice protects the statutory path. Send mail to the address for billing disputes on the statement (not the payment lockbox). Full chargeback clocks and provisional-credit cues: Credit card chargeback timeline.
Keep:
- Copy of the letter or secure message
- Proof of delivery or portal confirmation
- Order numbers, cancellation emails, and tracking
Unauthorized fraud often has separate zero-liability card-network rules; report those immediately by phone and follow up in writing.
Step-by-step dispute path
- Screenshot the charge and match it to receipts or app history.
- Contact the merchant once for a refund or correction; save the chat transcript.
- Call the issuer to flag fraud or open a dispute case number.
- Send a written billing-error notice within the window: your name, account, dollar amount, why it is wrong, and what you want fixed.
- Pay undisputed charges on time. For amounts properly under dispute, FCBA rules can limit how the issuer treats the disputed portion during investigation; read the issuer’s dispute notice and CFPB’s billing-error summary.
- Watch your credit reports if the issuer reports the account incorrectly after the dispute (How credit reports work).
Worked example
Lee’s statement dated March 3 shows a $480 online electronics charge. Lee canceled the order on February 20 and has a merchant email confirming cancellation. The package never shipped. Lee emails the merchant on March 4; no refund by March 12. Lee mails a dispute letter on March 14 to the issuer’s billing-errors address (inside 60 days of the March 3 statement). Lee pays the rest of the statement balance. The issuer credits the $480 pending investigation. If the merchant later proves delivery to Lee’s porch with a photo Lee recognizes, the charge can return. Lee still needed the paper trail.
Card disputes vs BNPL vs store financing
| Rail | Typical first stop | Watch |
|---|---|---|
| Credit card | Issuer + FCBA / network chargeback | 60-day written window for many billing errors |
| Debit card | Bank’s unauthorized EFT / Reg E process | Different timelines than FCBA |
| BNPL | BNPL app dispute flow + merchant | Late fees and reporting rules vary (Buy now, pay later risks) |
| Store / POS installment | Creditor named on the contract | Deferred-interest promos still run during fights; read dates |
Before you finance another cart to “replace” a disputed item, run Comparing financing offers and the online shopping checklist so you do not stack a second plan on a broken first order.
Scam-shaped “dispute helpers”
Advance-fee services that promise to erase any charge for a wire payment are a red flag (Credit and debt scams). You can dispute directly with the issuer for free. The CFPB and FTC take complaints when companies sell fake protection.
Checklist
- Circle the statement closing date and the first appearance of the bad charge.
- Gather merchant proof (cancellation, tracking, photos).
- Call the issuer; then write the billing-errors address within the window.
- Pay every undisputed amount by the due date.
- Calendar the issuer’s investigation follow-up date.
- Pull Equifax, Experian, and TransUnion reports if the account status looks wrong afterward.
- Stop shopping with the merchant until the case closes.
Educational only. Not legal advice, credit advice, or an offer of credit. FCBA and network rules have details and exceptions; confirm with your issuer and CFPB resources for your situation.