Credit Card Billing Errors: The 60-Day Letter and 90-Day Resolution Limit

Identify billing errors covered by Regulation Z

Regulation Z section 1026.13 covers defined billing errors on qualifying open-end consumer credit accounts. Examples include charges not made by the consumer or another authorized user, charges in an incorrect amount, some failures to reflect payments or credits and certain accounting or documentation errors. An ordinary disagreement about whether a delivered product met expectations may involve different legal rights and network chargeback procedures, so do not call every merchant dispute a statutory billing error without examining the facts.

Suppose a statement shows two $280 charges from a store even though only one transaction was authorized. A duplicate charge can be a billing error, and the consumer should identify both posting dates and provide the receipt for the genuine purchase. Another case may involve a $500 returned purchase that the card issuer failed to credit after an applicable merchant adjustment. Different dates may anchor the notice period. Before filing, check whether a suspicious entry is still pending, whether it has actually posted and whether it is a payment, fee or purchase. The remedy and documentation may differ.

Send the notice to the correct address before the deadline

A qualifying written billing-error notice generally must be received by the creditor at its designated billing-inquiries address no later than 60 days after the creditor transmitted the first statement reflecting the alleged error. That address can differ from the payment remittance address. Include identifying account information, the disputed amount and date, and a concise explanation of the error. A telephone call may trigger helpful customer service but does not necessarily replace the written-notice condition for the Regulation Z procedure.

If the first statement containing an unauthorized $450 charge was transmitted on October 5, count the regulatory notice period from that transmission, not from the day you finally opened the email. Keep a copy of the notice and evidence of receipt. The creditor's rules may permit a compliant electronic notice through a designated channel; do not assume any social media DM or ordinary reply to a promotional email qualifies. Use the dispute address on the statement or official agreement and send early enough to arrive on time. If a statement was never provided, the regulation has particular timing guidance; describe that fact in the notice rather than inventing a transmission date.

Know what the creditor must do while investigating

The creditor generally must acknowledge a qualifying billing-error notice in writing within 30 days unless it has already completed the required resolution. The issuer must resolve the matter within two complete billing cycles after receiving the notice, and in no event more than 90 days. That does not mean 90 business days or unlimited time whenever two billing cycles cross three calendar months. The billing-cycle rule is an actual account cycle measurement and interacts with the absolute outer limit.

During the regulated dispute process, the consumer has protections concerning collection of the disputed amount and related finance charges, but the undisputed portion of the account remains payable. If a $1,200 statement includes a properly disputed $300 charge and $900 of undisputed purchases, the customer should not infer that all $1,200 can be ignored. Read the issuer's instructions for calculating minimum payments while an amount is in dispute. A temporary credit may appear before the investigation concludes, and it may be adjusted if the issuer establishes that the alleged error did not occur. Keep a ledger of credits and fees so the same purchase is not effectively charged twice.

Distinguish credit-card disputes from debit and merchant refunds

The billing-error rule is attached to qualifying credit arrangements. Unauthorized checking-account debit-card transactions are generally analyzed under Regulation E, which has different notice and investigation steps. A merchant refund is another separate workflow: the merchant may promise to issue a credit, but the card issuer may not yet have received or posted it. If a refund is missing, record the merchant's written promise and the statement on which the credit should have appeared. The failure-to-credit timing issue can change which statement starts the 60-day period.

Imagine a retailer agrees on September 14 to refund $300, but the October statement still does not reflect a credit. Investigate whether the retailer submitted the refund or merely approved it internally. Request a transaction reference and explain the missing credit to the issuer through the appropriate billing-error channel if relevant. Do not misstate a failed delivery dispute as unauthorized card use when you deliberately purchased the product. Accurate categorization is more important than choosing the dispute label that sounds most serious in an app's menu.

Review the final explanation and correct subsequent statements

If the creditor agrees that a billing error occurred, check the principal adjustment, related charges and the next statement. If it concludes no error occurred, it must provide the applicable explanation and information required by the rule; ask for supporting documentation where permitted. Review whether the issuer met the acknowledgment and resolution periods rather than focusing only on a friendly call-center response. Keep the mailed notice, delivery proof, statements and any temporary credits as separate records.

Disputed amounts can affect credit utilization, required payments and delinquency reporting, so verify that erroneous balances did not contaminate later statements. If the dispute remains unresolved or the creditor's procedures were deficient, escalate with dates and citations to the specific omitted duty. A regulator complaint is useful, but it does not automatically expand the original 60-day written-notice window. Avoid making duplicate payments merely to make an apparent error disappear, because untangling multiple adjustments can be harder than establishing a single correct ledger. Verify that any temporary credit, interest adjustment and corrected minimum payment appear together on a later statement. A card issuer's message that the case is closed is not enough if the same disputed charge reappears as a balance or collection entry.

Editorial Verdict

The strongest credit-card billing-error case starts with the correct classification and a timely written notice sent to the issuer's designated address. Regulation Z generally uses a 60-day notice period from the first statement reflecting the error, a 30-day acknowledgment obligation and a resolution period of two complete billing cycles capped at 90 days. Those are not the same deadlines as unauthorized debit-card transfers. Keep paying undisputed amounts, record temporary credits and inspect the final statement for interest and fee corrections. A call or merchant chat may be convenient, but preserving the proper creditor-notice procedure is what gives the consumer a clearer federal rights framework.

Frequently Asked Questions

Is a phone call within 60 days enough to preserve Regulation Z billing-error rights?

A phone call alone may not satisfy the qualifying written-notice requirements, unless another applicable issuer procedure provides additional protection.

Does the 90-day limit mean the issuer can always take exactly 90 days?

No. It must act within two complete billing cycles and no later than 90 days after the qualifying notice.

Should I stop paying my whole credit-card bill while disputing one charge?

No. Undisputed balances and payment obligations generally continue, subject to the statute's protections for the disputed amount.

Sources

• CFPB — Regulation Z billing error resolution
• CFPB — official interpretation of billing errors
• CFPB — credit card dispute information