Dual Signature Checks: Why Banks Rarely Enforce Them and What to Use Instead
A dual signature check requires two authorized people to sign before it's valid, but most banks don't verify that both signed. Business deposit agreements at banks such as Bank of America and Atlantic Union say so directly, which makes the requirement an internal policy rather than a bank control.
That surprises a lot of finance teams. Many companies set up a two-signer rule years ago, put it on the signature card, and assumed the bank would bounce any check missing the second signature. Read the deposit agreement and you'll usually find the opposite.
None of this means the policy is useless. It means the thing it was supposed to do, which is make two people agree before money leaves, has to be built somewhere else.
Key Takeaways
A dual signature requirement asks for two authorized signers on a check, often only above a set dollar amount.
Many business deposit agreements state that the bank won't review checks for multiple signatures and won't be liable if it pays one with a single signature.
The Uniform Commercial Code treats a check missing a required signature as unauthorized, so the legal picture is less tidy than the agreements suggest.
Two signatures only separate duties if each signer independently checks the payee and amount against the invoice.
Approval workflows, segregated vendor setup and payment release, positive pay, and fewer checks do the job dual signatures were meant to do.
What is a dual signature check?
A dual signature check is a check that company policy says needs two authorized signers before it's issued. The requirement is usually set by a board resolution or banking resolution, recorded on the bank's signature card, and sometimes referenced in the deposit agreement.
Most companies apply it with a threshold. Checks under a set amount need one signer, and checks above it need two, so routine payments move quickly while larger ones get a second look. The threshold version is common in nonprofits, churches, homeowners associations, and small businesses, where it's often the main control over cash.
What type of bank account requires two signatures?
Few bank accounts truly require two signatures in a way the bank enforces. Some banks don't offer them at all. Bank of America's corporate and commercial Deposit Agreement and Disclosures says the bank doesn't offer accounts on which two or more signatures are required for a withdrawal, and that any such indication is for the customer's own internal procedures and isn't binding on the bank.
Other banks accept the instruction but disclaim enforcement. Ask your bank directly, in writing, whether it reviews checks for multiple signatures, and keep the answer with your banking resolutions.
Do banks check for dual signatures?
Generally, no. Most banks process checks through automated systems that don't inspect signatures on the vast majority of items, and their deposit agreements say they won't review checks for multiple signatures.
Atlantic Union Bank's Business Deposit Account Agreement is typical. It says the bank will not review checks or other withdrawal requests for multiple signatures, and that multiple-signature requirements are for the customer's own internal control purposes. It adds that the bank won't be liable if a check is processed without multiple signatures.
Banker associations encourage the same language. The Nebraska Bankers Association's deposit documentation guidance on dual-signature requirements suggests agreement wording that treats a two-signature requirement as being for the customer's internal control or other purposes, with the customer agreeing to hold the bank harmless.
The reason is practical. Banks clear checks in volume, mostly as images, and inspecting every signature against a signature card would be slow and expensive. They've chosen to push the responsibility back to the customer in the contract.
What if the bank pays a check with only one signature?
If a bank pays a check with only one signature on an account with a two-signer requirement, who bears the loss turns largely on the deposit agreement and on the Uniform Commercial Code, and the two can point in different directions.
The agreements quoted above disclaim liability. The UCC, though, says something that sounds stronger. UCC 3-403(b) provides that if the signature of more than one person is required to constitute the authorized signature of an organization, the organization's signature is unauthorized if one of the required signatures is missing.
How a court weighs a contract disclaimer against that rule depends on the facts, the state, and the exact agreement, and I'm not going to pretend there's a clean answer. If you're relying on dual signatures as a real control, have counsel read your deposit agreement against the UCC before a loss, not after one.
Is a dual-signature policy still worth it?
A dual-signature policy is worth something as a forcing function for review and very little as fraud prevention on its own. It makes a second person look at a check before it leaves, which only helps if that person actually checks the payee and amount against the invoice.
Several common habits defeat it:
Facsimile or stamped signatures let one person with access to the stamp or signature file produce a "two-signer" check alone. Whoever controls that file controls both signatures.
Busy signers often sign a pile of checks without opening the backup, so the second signature confirms nothing.
If one of the two signers also set up the vendor or keyed the payment, the review isn't independent.
A check correctly signed by two people can still be stolen from the mail and washed, with the payee and amount rewritten after both signatures were applied.
Each of these leaves the policy intact on paper while removing the review it was supposed to guarantee. That's why auditors tend to ask how the second signer reviews a check, not just whether there's a second signature.
Check fraud is still the most common payment fraud companies report. Paper checks were the payment method most targeted by fraud in 2025, cited by 58% of organizations, followed by ACH debits at 30% and wire transfers at 25%, according to the 2026 AFP Payments Fraud and Control Survey Report. The same survey found 76% of US organizations experienced attempted or actual payments fraud in 2025, and 74% were affected by business email compromise. A second signature does nothing about a fraudulent change to a vendor's bank details or a washed check, which is why it can't carry the control load alone. Corpay's single-use virtual cards close one of those gaps, because each card number works for one approved payment and can't be washed or reused.
I'd keep a two-signer rule where it's cheap and already in place, especially in small organizations with few staff. I wouldn't count it as the control that protects the company.
Protect cash flow with modern AP
Modernize AP to cut costs, speed approvals, and mitigate payment risk — gaining the real-time visibility to protect cash flow and scale with confidence.
Download the whitepaper
What dollar amount should trigger a second signer?
The dollar amount that triggers a second signer is a policy decision, not a rule, and it should match the approval limits already in your delegation of authority. If a manager can approve invoices up to a certain amount, the check-signing threshold should line up with that limit rather than sit at an unrelated round number.
A few inputs usually settle the number:
Match the signing threshold to the invoice approval limits already in place, so no one can sign a check above what they could approve.
Look at last year's checks by amount. A threshold that catches the top slice of dollar value without catching every routine payment keeps signers paying attention.
A small office with two signers may need a lower threshold, because one person often handles most of the rest of the process.
Crime insurance policies and audit findings sometimes set expectations for dual control on larger disbursements.
Write the number into the banking resolution and the AP policy so signers, auditors, and the bank all work from the same figure. Review the threshold every year. As payment volume shifts to electronic rails, the remaining checks tend to be the odd, high-risk ones, and a threshold set when checks were routine may be too high for what's left.
What replaces the second signature in a modern AP process?
An approval workflow replaces it, with independent review that happens before the payment exists, backed by segregation of duties and controls at the bank. The goal is the same as a second signature, which is that no single person can create and release a payment alone.
GAO's Standards for Internal Control in the Federal Government, Principle 10, states the principle well. Management divides or segregates key duties among different people to reduce the risk of error, misuse, or fraud, so that no one individual controls all key aspects of a transaction. Applied to AP, that means three separate hands:
One person or team sets up and changes vendors, including bank details.
A different person approves invoices against the purchase order and receipt.
Someone else releases the payment, and the bank checks it against what was released.
The difference from dual signatures is timing. A signature is applied to a finished check, after the payee and amount are fixed. An approval in software happens before the payment file is created, against the invoice, with the evidence attached. Segregation of duties in accounts payable goes deeper on how to split those roles in a small team.
Control | What it checks | When it happens | What it leaves behind |
Dual signature | That two people signed the check | After the check is printed | A second signature, rarely verified by the bank |
Approval workflow | Payee, amount, and invoice match, by an independent approver | Before the payment exists | A timestamped approval tied to the invoice |
Positive pay | That a presented check matches what was issued | When the check is presented | A bank exception record |
Fewer checks | Nothing, by design | Before payment, by choosing another rail | No paper to steal or alter |
The tracked question about voiding payments without manager approval belongs here too. Voids and reissues should follow the same approval path as the original payment, because a void-and-reissue to a new payee is a classic way around a control that only covers new payments. Positive pay catches some of what slips through at the bank.
You send the bank a file of issued checks, and it flags any presented item whose number, amount, or payee doesn't match, so a washed check gets stopped before it clears. Payee positive pay matters most here. Standard positive pay matches the check number and amount, so a washed check that keeps its original amount under a new payee name can pass unless the bank also compares the payee. Converting vendors off paper catches more, and the true cost of paper checks usually makes the business case.
The shift is already well underway. Checks fell from 32% of B2B payments by number in 2015 to 13% in 2024, while ACH rose from a quarter of payments to 41%, according to a Federal Reserve Bank of Cleveland payments research brief. B2B payments on the ACH Network reached 2.2 billion in the second quarter of 2026, up 9.9% year over year, according to Nacha. Across the whole economy, US check payments fell to 9.2 billion by number and $24.45 trillion by value in 2024, down 1.8 billion and $1.92 trillion from 2021, according to the Federal Reserve Payments Study. As far back as 2021 and 2022, check fraud was surging. Financial institutions filed more than 350,000 check-fraud suspicious activity reports with FinCEN in 2021, up 23%, and over 680,000 in 2022, nearly double, according to FinCEN's February 2023 alert.
When I've seen dual-signature policies fail, it was rarely the bank's fault. The second signer was usually the controller signing a stack on a Friday afternoon, trusting that whoever prepared the checks had matched them to invoices. That gives the company a second autograph with no real review behind it. Moving the review into the approval step is what fixes it.
How do approval workflows create evidence auditors accept?
Approval workflows create evidence by recording who approved each invoice, when, and against which documents, in a log nobody can quietly edit. That's the AP audit trail auditors test, and it's far stronger than a signature on a check image.
Manual approvals are a drag on most teams. In Yooz's 2025 survey of 600 US finance professionals, 69% of finance leaders said their teams spend at least four hours a week tracking down documents and approvals. Automation changes that math. AP solutions in The Hackett Group's evaluation of 15 providers averaged 60% touchless invoice processing, and companies processing at least three in ten invoices touchless averaged 3.5 times higher AP productivity, according to Hackett's Digital World Class Matrix for Accounts Payable. Good invoice approval workflows route each invoice to the right approver by amount and department, and AP approval software keeps the history ready for an accounts payable audit.
How Corpay supports approval-first payments
The weakest point in a dual-signature process is the review that happens after a check is already printed. Corpay moves that review earlier. Corpay AP automation is fully managed AP that routes invoices for approval before payment, then pays suppliers by virtual card, ACH, or check, so fewer payments depend on paper and signatures at all.
Corpay payments automation handles supplier enrollment and payment delivery, and single-use virtual cards give card-accepting suppliers a payment that can't be reused. Corpay connects to your ERP through 100+ integrations, including NetSuite, Sage Intacct, Business Central, and Acumatica, and most programs are live in weeks.
Frequently Asked Questions
Do banks verify both signatures on a two-signer check?
Usually not. Many business deposit agreements state that the bank won't review checks for multiple signatures and won't be liable for paying a check with one. Treat a two-signer rule as an internal control your own team has to enforce.
What does dual signature mean?
Dual signature means a check, or a payment above a set amount, needs two authorized signers under company policy. It's meant to ensure two people review a payment before it leaves, though the second signer only adds protection if they check the backup.
Can one person sign a dual signature check?
Physically, yes, and the bank will often pay it. That's why the requirement is weak on its own. Facsimile signatures make it easier still, so companies relying on two signers should restrict who controls signature stamps and printing.
Are facsimile signatures allowed on business checks?
Many banks accept facsimile signatures if the account documentation authorizes them, but the terms vary by bank and agreement. If you use them, control access to the signature file or stamp tightly, because a facsimile lets one person produce a fully signed check.
Switch to Corpay
Discover how making the move to Corpay streamlines payments and strengthens your business.
Talk to an ExpertSmarter payments. Stronger growth. Keep business moving.
Corpay powers payments for 800,000+ businesses worldwide. Let’s build what’s next for yours.