A “Reverse ACH WEB Single” line on your bank statement is your bank’s way of describing a one-time electronic debit that was pulled from your account through the ACH network, based on an authorization you gave on a website or mobile app. In plain terms: money went out, it moved over the Automated Clearing House system, you approved it online, and it was a single payment rather than a recurring one. The same descriptor can also show up when an earlier ACH deposit is being clawed back, so before assuming it’s a new charge, compare the amount to your recent credits.
What Each Part of the Label Actually Means
The descriptor is stitched together from standardized pieces, and each one tells you something specific.
Reverse. Your bank uses this word to flag that funds left your account instead of arriving in it. Some banks also apply it when a previously deposited ACH credit is being taken back by the sender to correct an error, such as a payroll deposit sent in the wrong amount. If the dollar figure matches an earlier deposit, treat the entry as a possible correction rather than a fresh withdrawal.
ACH. This identifies the payment rail. The Automated Clearing House is the electronic network that moves money between U.S. bank accounts in batches, and it carries everything from direct-deposit paychecks to online bill payments.
WEB. This is a Standard Entry Class code assigned by whoever originated the payment. It means the authorization came through a website or mobile app rather than over the phone or on paper. Because internet authorizations have no signature and no face-to-face check, they carry their own fraud-detection requirements under the Nacha Operating Rules.
Single. The authorization was for one payment, not a recurring subscription or automatic monthly draft. If you thought you were setting up recurring payments and the entry reads “Single,” the merchant processed your authorization as a standalone event, and you’d need to enroll in autopay separately.
Why This Entry Usually Shows Up
The typical trigger is a one-time payment you made through a company’s website or app by entering your bank’s routing and account numbers directly, rather than paying by card. Common sources include:
- Utility and municipal bills paid through the provider’s portal using the “pay by bank” or “e-check” option.
- One-time extra payments toward a student loan, auto loan, or credit card balance made through the lender’s dashboard.
- E-commerce checkouts where you chose a direct bank transfer instead of a card, sometimes labeled “pay with your bank account.”
- One-time transfers into a brokerage or retirement account initiated through the platform.
- Peer-to-peer app transfers that pull funds directly from your bank account.
- One-time federal or state tax payments made through an authorized e-pay portal.
In every one of these, the “Single” tag confirms you didn’t schedule an ongoing series of payments.
Figuring Out Who Charged You
Beyond the “Reverse ACH WEB Single” label itself, the line on your statement usually includes text that identifies the company. Most banks display a shortened version of the originator’s legal or brand name, and you may also see a ten-digit Company Identification number assigned by the originator’s bank.
ACH files can also carry an 80-character addenda field with supplemental details like an invoice number or payment description. Whether your bank shows that extra text depends on the bank and on how you’re viewing the account. If the descriptor alone doesn’t jog your memory, search your email for a payment confirmation matching the date and amount, or contact the company named in the entry.
When “Reverse” Signals a Claw-Back Instead of a Payment
“Reverse ACH” as a statement label just means money moved out. An ACH reversal, in the technical sense used in the Nacha Operating Rules, is something narrower: a formal correction to undo a processing mistake. A company can request a reversal only for specific reasons, including duplicate entries, payments sent to the wrong account, incorrect amounts, debits processed earlier than intended, or credits processed later than intended. The reversal must reach the receiving bank within five banking days after the settlement date of the original erroneous entry. Using a reversal for buyer’s remorse or a funding shortfall isn’t allowed under the rules, and the receiving bank can reject an improperly initiated one.
If the company description on your statement includes the word “REVERSAL,” the entry is likely a correction of a prior error, and a matching credit should appear on your statement (or should have already appeared). If you can’t find that offsetting credit, contact your bank.
Disputing a Charge You Didn’t Authorize
If a Reverse ACH WEB Single entry appears that you never approved, the Electronic Fund Transfer Act and Regulation E give you the right to dispute it. How much you get back depends heavily on how quickly you act.
Deadlines and Liability
Report the unauthorized transfer to your bank within two business days of learning about it and your liability is capped at $50. Miss that window but report within 60 days of the statement date, and your liability can rise to $500. After 60 days, you face unlimited liability for any further unauthorized transfers that happen between the end of that 60-day window and the day you finally notify the bank. That means the bank has no obligation to reimburse those later charges. Check your statements promptly.
What the Bank Has to Do
Once you report the problem, the bank has 10 business days to determine whether an error occurred. It can take up to 45 days if it needs more time, but only if it provisionally credits your account for the disputed amount within those first 10 business days so you have access to the funds while the investigation runs.
During the investigation, the bank contacts the originating company to verify whether a valid authorization exists. When a consumer disputes a WEB debit as unauthorized, the return is processed under return reason code R10.
Filing a false claim carries serious consequences. The sample Written Statement of Unauthorized Debit form warns that intentionally misrepresenting whether a transaction was authorized can result in fines up to $1,000,000, imprisonment up to 30 years, or both under federal bank fraud law. Only file a dispute for a charge you truly did not authorize.
How to File
Contact your bank as soon as you spot the charge, by phone, in person, or through secure messaging. Follow up in writing if the bank asks. Include the transaction date, the dollar amount, and any identifying details from the descriptor. Keep copies of everything you send. Your bank may ask you to complete a Written Statement of Unauthorized Debit as part of the formal process.
Stopping the Next Debit
If you’re worried the same company will try to pull funds again, you can place a stop payment order. Under Regulation E, you can stop a preauthorized electronic fund transfer by notifying your bank at least three business days before the scheduled payment date. Notice can be given by phone, in person, or in writing.
If you notify the bank orally, it can require you to send written confirmation within 14 days. Skip the follow-up and the oral stop payment order expires after those 14 days. Banks commonly charge a fee for stop payment orders, and the amount varies by institution, so check your account agreement.
For a one-time WEB entry, stopping a specific future payment is straightforward because the original authorization was for a single transaction. If you suspect the same originator might attempt another debit without permission, ask your bank about placing a block on that company using the Company Identification number from the original entry.