Report an unauthorized ACH debit to the bank holding the consumer account as soon as you discover it, even when the company promises a refund. Provide the transaction date, amount, descriptor, why it was unauthorized, and when you first notified the bank. Track the bank’s Regulation E investigation, any written-confirmation request, provisional credit, and final determination as separate events.
A consumer with a $500 ACH debit waited for a merchant refund that never arrived and then learned the bank could open a formal dispute. The recurring mistake is treating a merchant reference number as a substitute for notifying the account-holding bank.
Start here: a practical action plan
- Save the bank notice, transaction detail, agreement, and every dated confirmation.
- Build the cash plan from verified available money after holds and pending items.
- Use the institution’s official channel and request a case or reference number.
- Reconcile the final credit, debit, check, fee, or closure entry before spending it.
- Treating an available balance, provisional credit, or mailed check as final cash.
- Closing or emptying an account while checks, direct deposits, or automatic debits remain active.
- Relying on a merchant promise or app message instead of using the bank’s formal error and notice process.
Open the bank claim without waiting for a merchant
Save the statement, transaction detail, merchant messages, authorization records, and any refund reference. Contact the bank using the number on the statement or official app. State whether you never authorized the debit, revoked authorization, or dispute the amount or date of an authorized transfer.
Regulation E error-resolution rules apply to qualifying electronic fund transfers from consumer accounts. CFPB says to report unauthorized transactions promptly. Different facts can affect liability and timing, so do not wait for a merchant’s internal refund window to expire before notifying the bank.
Worked example: protect the statement deadline
Example: an unauthorized $500 ACH debit posts October 29. The statement is sent November 2. The consumer contacts the bank November 6 and receives claim number 8421, then sends requested written confirmation November 9.
The cash plan excludes the $500 until a refund or credit actually posts. If the merchant later sends $500 and the bank also credits $500, one credit may be reversed to prevent double recovery. Track both sources.
| Hypothetical claim event | Date | Ledger treatment |
|---|---|---|
| ACH debit posts | Oct. 29 | -$500 |
| Statement sent | Nov. 2 | Save deadline anchor |
| Bank notified | Nov. 6 | Claim 8421 opened |
| Written confirmation | Nov. 9 | Delivery proof saved |
Track the investigation and document request
Record the date of first bank notice because federal investigation periods can run from notice. CFPB says a bank generally has ten business days to investigate, with longer periods allowed when it provides qualifying temporary credit. New accounts and certain transactions can have different periods.
If the bank requests written confirmation after an oral report, send it within the stated deadline and keep delivery proof. Regulation E limits when a bank may condition provisional credit on written confirmation, but the safest operational response is a complete, timely packet.
Reconcile merchant refunds and bank credits separately
Ask for the final written determination and the documents the bank relied on if the claim is denied. Compare merchant authorization data, account descriptors, device or access facts, and your cancellation or revocation evidence.
Keep the disputed debit, merchant refund, provisional credit, final credit, reversal, and fees on separate ledger lines. A pending or temporary credit is not permanent spending money.
- Notify the account-holding bank promptly.
- Send requested evidence with delivery proof.
- Track temporary and final credits separately.
- Request the final determination and documents.
Frequently asked questions
Can a consumer dispute an unauthorized ACH debit?
Yes. Qualifying ACH debits from consumer accounts are electronic fund transfers subject to Regulation E error resolution.
Should I wait for the merchant’s refund?
No. Notify the bank promptly while continuing to document any merchant response.
What information should I give the bank?
Provide the date, amount, descriptor, authorization facts, discovery date, and supporting records.
Is provisional credit permanent?
No. It can become final or be reversed after the investigation.
What if the bank asks for a signed statement?
Return it promptly and keep proof, especially when the initial report was oral.
Can I keep both a merchant refund and bank credit?
Do not assume so. Track both because duplicate recovery can lead to a later reversal.
Sources and review notes
The calculations and scenarios in this guide are original BreadWinnr worked examples. We recalculated each example and checked that its parts match the stated total. Official sources support the financial concepts. Forum links document the reader problem that prompted the guide and are not treated as financial authority.
- CFPB: Unauthorized bank transaction response
- CFPB Regulation E: Error resolution
- Reader question: disputing a $500 ACH debit
Read our research, testing, corrections, and source policy.
This guide provides general financial education. It does not account for your complete financial, tax, legal, or contractual situation.
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