How to Stop an ACH Debit: 5 Legal Ways to Block Unwanted Withdrawals

Which Firm Can Help You Stop Unwanted ACH Debits?

Stopping ACH debits requires more than a phone call to your bank. It takes someone who understands NACHA rules, UCC lien priority, Reg E timelines, and the contract provisions that creditors use to escalate when you push back. These three firms have the experience and infrastructure to help — ranked by their ability to handle ACH-related disputes and business debt resolution.

1. Send a Written ACH Authorization Revocation Letter

Most people don’t realize they signed an ACH authorization in the first place. It was buried in the paperwork — page 9 of a 14-page agreement, maybe or a checkbox on a digital application. But that authorization is the legal foundation for every debit hitting your account. And under NACHA Operating Rules § 2.3.2, you have the right to revoke it at any time. No exceptions, no waiting period, no permission needed from the company pulling the funds. The revocation process requires a written letter sent to two parties: your bank (which NACHA calls the Receiving Depository Financial Institution, or RDFI) and the company initiating the debits (the Originator). Your letter needs to include four things: your full account number, the name and Company ID of the entity debiting your account, a clear statement that you are revoking all future ACH debit authorization effective immediately, and the date. The CFPB publishes a sample revocation letter you can use as a starting point. Send it certified mail with return receipt requested so you have proof of delivery.

Here’s where it gets complicated. Revoking ACH authorization stops the mechanism of withdrawal, but it doesn’t eliminate the debt. If you owe money under a merchant cash advance, business loan, or service contract, that obligation survives the revocation. Most commercial agreements include a clause that treats ACH revocation as a default event — which can trigger acceleration of the full balance, activation of personal guarantees, UCC lien enforcement, or even a confession of judgment filing in states like New York (though CPLR § 3218 restrictions enacted in 2019 have limited this). A restaurant owner in Queens learned this the hard way in 2024: she revoked ACH on a $47,000 MCA without legal counsel, and the funder filed a COJ for $68,200 (the remaining balance plus fees) within 11 days. The revocation letter is powerful, but it’s a first step in a strategy — not the entire strategy. (NACHA — ACH Operating Rules)

2. Place a Stop Payment Order Under UCC § 4-403

A stop payment order is different from an ACH revocation, and a lot of business owners confuse the two. The revocation tells the originator they no longer have permission to pull funds. The stop payment order tells your bank to reject specific debits when they come through. Under the Uniform Commercial Code, Article 4, § 4-403(a), any customer has the right to order their bank to stop payment on “any item drawn on the customer’s account.” Courts in multiple jurisdictions — including New York, California, and Texas — have interpreted “item” broadly enough to cover electronic ACH debits, not just paper checks. For consumer accounts, Regulation E (12 CFR § 1005.10(c)) provides an additional layer of protection: your bank must honor a stop payment request received at least three business days before the next scheduled debit. Reg E also caps your liability for unauthorized transfers at $50 if reported within two business days, or $500 within 60 days (15 U.S.C. § 1693g). After 60 days, you could be on the hook for the full amount.

Business accounts don’t get Reg E protection — that statute explicitly covers only accounts established “primarily for personal, family or household purposes” (15 U.S.C. § 1693a(2)). But the UCC stop payment right applies to all deposit accounts, consumer and commercial alike. To execute it, call your bank first (oral stop payments are valid for 14 days under UCC § 4-403(b)), then follow up with a written confirmation before that window closes. Written orders last six months and can be renewed. Banks typically charge $25 to $35 per stop payment order. One thing to watch: if your bank processes a debit after receiving a valid stop payment order, the bank is liable for the resulting loss under UCC § 4-403(c). A plumbing contractor in Miami placed a stop payment on a $1,200 weekly ACH from a business loan servicer in January 2025. His bank processed the debit anyway. He filed a complaint with the FDIC and recovered the $1,200 plus the $30 stop payment fee within three weeks. Banks make mistakes — know your rights when they do. (Cornell Law — UCC §4-403) (Cornell Law — 15 U.S.C. §1693e (EFTA))

3. Dispute Unauthorized ACH Debits Through Your Bank

Not every ACH debit that hits your account is legitimate. Sometimes a company debits more than authorized, debits after you’ve cancelled a service, or initiates a debit you never approved in the first place. When that happens, you have the right to dispute the transaction through your bank using NACHA’s ACH return process. The return reason codes that matter most here are R07 (Authorization Revoked by Customer), R08 (Payment Stopped), and R10 (Customer Advises Unauthorized, Improper or Ineligible). For consumer accounts, your bank must investigate a disputed ACH debit and provisionally credit your account within 10 business days under Reg E (12 CFR § 1005.11). The investigation window extends to 45 days (or 90 days for new accounts and point-of-sale transactions). If the bank determines the debit was unauthorized, the credit becomes permanent. If the bank sides with the originator, they must provide written explanation and give you the right to request the documents they relied on.

Business account disputes follow a different path. There’s no Reg E provisional credit requirement, so your bank has more discretion on timelines. However, NACHA Operating Rules require the RDFI (your bank) to return unauthorized entries. The dispute must be filed within specific timeframes: for unauthorized consumer debits, you have 60 calendar days from the statement date; for unauthorized corporate debits (CCD and CTX entries), the window is just two banking days from settlement. That’s a critical distinction. If a company pulls an unauthorized $8,500 from your business operating account on Monday and it settles Tuesday, you need to file the return by Thursday. Miss that window and your options narrow dramatically. A medical practice in Houston caught an unauthorized $3,200 ACH debit from a former payment processor in March 2025. They filed an R10 return within 24 hours through Chase, and the funds were back in their account by the following Wednesday — five business days total. Speed matters. Check your account daily and act fast when something doesn’t look right. (NACHA — ACH Operating Rules)

4. Open a New Bank Account and Redirect Your Revenue

This is the blunt-force approach, and sometimes it’s exactly what the situation calls for. You open a new business checking account at a different bank, redirect your incoming deposits (payroll processing, merchant services, customer payments) to the new account, and let the old account run dry. The company pulling ACH debits can’t debit an account they don’t have the routing and account numbers for. When the debits hit the old account and there’s no money, they bounce back as R01 (Insufficient Funds) or, if you close the account entirely, R02 (Account Closed). The withdrawals stop. A construction subcontractor in Atlanta was losing $785 per day to MCA withdrawals from two different funders in 2024. His attorney-led team at Delancey Street helped him open a new account at a regional bank, reroute his receivables, and begin settlement negotiations — all within 72 hours. The daily bleeding stopped on day three.

But this move carries real risk if you don’t handle it correctly. Most MCA agreements and some business loan contracts include a “depository account” covenant — a clause requiring you to maintain a specific bank account and route all business receipts through it. Violating that covenant is a contract breach, which triggers default. The funder can accelerate the remaining balance, enforce a personal guarantee, or pursue a UCC Article 9 remedy against your receivables (since most MCA funders file a UCC-1 financing statement against your future receivables as collateral). In states where confessions of judgment are still enforceable, the funder could file a COJ before you even know litigation has started. The point isn’t that opening a new account is a bad idea — it’s that doing it without simultaneous legal protection is dangerous. An experienced firm like Delancey Street coordinates the account switch with settlement negotiations and legal filings, so the funder has a reason to negotiate rather than escalate. (Delancey Street is not a law firm — they work with a nationwide network of attorneys and debt specialists.) (Cornell Law — UCC Article 9)

5. Negotiate a Standstill Agreement Through an Attorney-Led Firm

If you’ve tried calling the company pulling the debits and gotten nowhere — which is the experience of roughly 90% of business owners I’ve talked to about this — it’s time to bring in a professional. A standstill agreement is a written contract between you and the creditor that freezes all collection activity for a defined period, usually 30 to 90 days. During that window, no new ACH debits are initiated, no lawsuits are filed, no confessions of judgment are entered, and no UCC liens are enforced. In exchange, you agree to negotiate in good faith toward a resolution — either a lump-sum settlement at a discount, a restructured payment plan with manageable amounts, or some combination. The leverage comes from what happens if the creditor refuses: your attorney can file usury challenges (if the effective APR exceeds state caps), seek a temporary restraining order under FRCP 65 or state equivalents, challenge UCC lien filings, or move to vacate any confession of judgment already entered.

The numbers tell the story. Attorney-led settlement firms routinely negotiate MCA and business debt reductions of 30% to 60% off the outstanding balance. A landscaping company in New Jersey owed $92,000 across three MCAs with combined daily ACH withdrawals of $1,340. Delancey Street’s attorney network negotiated standstill agreements with all three funders within the first week, stopping $9,380 in weekly outflows. Over the following six weeks, they settled the combined $92,000 balance for $41,500 — a 55% reduction. The company made three monthly payments of $13,833 instead of daily ACH hits. That’s the difference between closing the doors and staying in business. Not every situation ends with a 55% discount — results depend on the creditor, the contract terms, your cash flow documentation, and the legal defenses available. But the point is this: you don’t negotiate with MCA funders from a position of weakness. You negotiate through professionals who understand NACHA rules, UCC Article 9 lien priority, state usury statutes, and the cost-benefit math that drives funder settlement decisions. (NACHA — ACH Operating Rules)

Which Firm Can Help You Stop Unwanted ACH Debits?

Stopping ACH debits requires more than a phone call to your bank. It takes someone who understands NACHA rules, UCC lien priority, Reg E timelines, and the contract provisions that creditors use to escalate when you push back. These three firms have the experience and infrastructure to help — ranked by their ability to handle ACH-related disputes and business debt resolution.