Regulation E (Electronic Fund Transfer Act) is the federal rule set that covers many consumer electronic fund transfers - ATM/debit transactions, ACH pulls and credits, some person-to-person transfers, and similar. When your bank or credit union makes an error (wrong amount, duplicate debit, missing deposit, unauthorized EFT, and related mistakes), Reg E sets notice clocks, investigation duties, and - often - provisional credit rules. A bounced or unpaid deposit that reverses after you spent provisional credit is a different problem: Handle a returned deposit item.
This guide is about bank/credit-union EFT errors and how to put the dispute in writing. Unauthorized ACH steps: Unauthorized ACH debit. Card-network chargebacks: Unauthorized card charges. Fee fights that are not EFT errors: Disputing a bank fee.
What usually counts as a Reg E “error”
| Situation | Often Reg E path? | Notes |
|---|---|---|
| Duplicate ACH debit for the same bill | Yes | Ask for reverse + originator block if needed |
| ATM or debit amount wrong vs receipt | Yes | Keep the receipt and statement screenshot |
| Direct deposit posted for less than payroll stub | Often | Employer vs bank: document both |
| Unauthorized EFT / account takeover debit | Yes | Pair with phishing / ATO cleanup |
| You dislike an overdraft fee you authorized | Usually fee dispute, not classic EFT “error” | See Checking account fees |
| Credit-card purchase dispute | FCBA / card network, not Reg E bank EFT | Use issuer dispute flow |
Exact coverage has nuances (wire transfers and some business accounts differ). Confirm with your institution’s Reg E disclosure and CFPB materials.
Notice timelines (consumer side)
Reg E expects you to notify the institution promptly after you learn of the error - commonly within 60 days of the statement that first showed the problem (read your bank’s exact wording). Waiting longer can shrink or eliminate protections.
Practical sequence at Chase, Bank of America, Wells Fargo, Capital One, Ally, Navy Federal, and similar:
- Call the number on the debit card or statement the day you spot the issue; get a claim or case number.
- Follow up in writing (secure message or mailed letter) so the clock and facts are documented.
- Ask whether provisional credit applies while they investigate.
- Keep using the account carefully; watch for repeat pulls.
If you are mid-bank switch, still dispute at the institution that holds the errored account - do not assume the new bank can fix the old one’s EFT.
What to put in writing
Send a dated notice that includes:
- Your name, account number (or masked form the bank requests), and contact info
- The date and amount of each disputed EFT
- Why you believe it is an error (duplicate, wrong amount, unauthorized, missing credit)
- Copies of receipts, payroll stubs, ACH authorizations, or screenshots (keep originals)
- A clear ask: correct the error, return the funds, and confirm in writing
Example openers (adapt; not a legal form):
On March 12, my checking account ending 4821 was debited $187.50 twice by ACME Utilities (ACH). I authorized only one payment. Please investigate under Regulation E, reverse the duplicate, and provide provisional credit if applicable. Case number from my phone call: 9X772.
Ask in the same message:
- Is this coded as a Reg E error investigation?
- When will provisional credit post if required?
- What written confirmation will I receive when the investigation closes?
Worked example: the missing $2,100 direct deposit
Priya’s employer (a regional hospital) shows a $2,100 net pay ACH sent on Friday. Ally’s app still shows no credit Monday morning. Priya’s rent ACH clears Tuesday and the account goes negative.
Priya calls Ally’s number from the app Help page, opens a case, then sends a secure message with the pay stub, employer ACH trace details, and the statement PDF. Ally investigates the missing EFT. Provisional handling and timelines depend on the facts; Priya’s written packet is what keeps the dispute from becoming a “he said / she said” with payroll.
Separately, Priya asks HR for the NACHA trace - not because Ally is wrong by default, but because payroll and bank errors both happen.
Checklist
- Mark the statement date that first showed the problem; calendar the notice window.
- Call the official bank/CU number; save the case ID.
- Send a written Reg E error notice with dates, amounts, and evidence.
- Ask about provisional credit and the investigation deadline they cite.
- Monitor for repeat EFTs; revoke bad ACH authorizations when relevant.
- Escalate with the bank’s complaint process or CFPB if the investigation stalls without a clear written outcome.
Educational only. Not legal or banking advice. Regulation E and institution procedures have details and exceptions; confirm with your bank’s EFT disclosure and CFPB resources.