Accounts Payable Fraud: Common Schemes,
Risks & How to Protect Your Business

Accounts payable fraud costs U.S. businesses billions of dollars annually, and the risk is only growing. As finance teams become more decentralised with remote and hybrid work models, the chance of something slipping through the cracks has never been higher.

Whether it’s a fake vendor slipping into your system or a trusted employee abusing their access, accounts payable (AP) fraud can have serious consequences for your business. The good news? You can protect yourself, but understanding how these schemes work.

In this article, we’ll break down what accounts payable fraud looks like in real life, explore the most significant risks, share the most common AP fraud schemes, and show you how to proactively defend your business using smart processes and technology.

What is Accounts Payable Fraud?

Accounts payable fraud refers to any intentional act of deception that results in unauthorised or unlawful payments from a company’s accounts payable function.

In simpler terms, it means someone, either inside or outside your organisation, manipulates the AP process to get paid when they shouldn’t.

Real-World Example:

A staff member creates a fake supplier account, submits invoices for services never rendered, and directs payments to their personal bank account. Without the right controls in place, this could continue undetected for months.

AP departments are often targeted because they handle high volumes of transactions and involve multiple parties. Without automation, oversight, and segregation of duties, these teams can become easy entry points for fraud.

The Risks of Accounts Payable Fraud

Accounts payable fraud doesn’t just hit your balance sheet. It can expose your business to a range of serious and long-lasting issues:

• Financial Loss: Direct theft or duplicate payments quickly add up, especially if fraud continues unnoticed over time.
• Reputational Damage: Vendors, investors, and stakeholders lose trust when financial controls break down.
• Legal & Regulatory Exposure: Fraud can result in compliance breaches, audits, and costly penalties.
• Operational Disruption: Investigating and resolving AP fraud drains time, money, and resources.
• Difficulty Recovering Funds: Recovery is often impossible once payments leave your account, especially via wire transfer.

Common Accounts Payable Fraud Schemes

Here are some of the most frequent and damaging accounts payable fraud schemes you need to know about:

1. Fake Vendors (Shell Companies)

What it is: A fraudulent vendor is created with fake or falsified information to receive payments for non-existent services.
Warning signs: Vendor names that closely resemble legitimate ones, P.O. box addresses, or bank details matching employees.
Example: An insider sets up “ABC Cleaning Services” and submits small invoices monthly. Payments are approved without proper verification.

2. Duplicate or Altered Invoices

What it is: Submitting the same invoice multiple times, or changing dates and amounts to bypass controls.
Warning signs: Multiple invoices with near-identical line items or invoice numbers.
Example: A vendor submits the same invoice twice, slightly altering the amount or formatting so it appears unique.

3. Collusion with Internal Employees

What it is: Employees work with external parties to approve or overlook fraudulent transactions.
Warning signs: Unusually close vendor-employee relationships, repeated use of a single vendor, or invoice approvals outside protocol.
Example: A procurement manager receives kickbacks in exchange for approving padded invoices.

4. Overpayments & Kickbacks

What it is: Paying vendors more than required, with the expectation of receiving a portion back.
Warning signs: Payments consistently higher than agreed terms, or vague service descriptions.
Example: A supplier inflates invoice totals, then shares a cut of the overage with a cooperating employee.

5. Check Tampering

What it is: Forging, altering, or intercepting physical checks before they reach legitimate vendors.
Warning signs: Missing checks, discrepancies in payee names, or delayed deliveries.
Example: An AP clerk changes the payee name after the check is printed but before it’s sent.

6. ACH or Wire Transfer Fraud

What it is: Diverting electronic payments to unauthorised bank accounts.
Warning signs: Sudden changes to bank details, especially without prior notice or documentation.
Example: A fraudster impersonates a vendor via email and requests a change to payment instructions.

7. Expense Reimbursement Abuse

What it is: Employees submit false or inflated reimbursement claims for travel or business expenses.
Warning signs: Repetitive or rounded claims, personal purchases disguised as business costs.
Example: An employee submits the same hotel receipt for two trips or inflates mileage claims.

Red Flags and Early Warning Signs

Fraud often leaves a trail, if you know what to look for. Common indicators of accounts payable fraud risk include:

• Sudden or unverified changes to vendor payment details
• Employees who never take leave or resist sharing tasks
• Invoices that look inconsistent or lack supporting documents
• “Urgent” or last-minute payment requests that bypass normal approvals
• Vendor addresses or bank accounts that match those of employees

Spotting these early can prevent significant losses.

How to Prevent Accounts Payable Fraud

Finance teams can reduce accounts payable fraud risk with the right combination of process, people, and technology:

1. Implement Segregation of Duties

No single employee should have full control over the AP process. Divide responsibilities between data entry, approval, and payment.

2. Use Multi-Level Approval Processes

Introduce tiered approvals for high-value or high-risk payments. This makes fraud more challenging to execute and easier to catch.

3. Conduct Regular Audits

Frequent internal audits, scheduled and surprise, help identify inconsistencies and enforce accountability.

4. Enforce Vendor Management Protocols

Create a formal process for vendor setup, validation, and ongoing review to prevent fake suppliers from slipping in.

5. Train Employees on Fraud Awareness

Awareness is a powerful defence. Train staff to recognise red flags, follow protocols, and report suspicious behaviour.

6. Leverage Technology & Automation

Modern AP automation tools can detect duplicate invoices, flag anomalies, and enforce workflow discipline, making fraud much harder to execute.

How Traild Helps Prevent Accounts Payable Fraud

Traild is designed with fraud prevention at its core, giving finance teams the visibility, automation, and controls needed to stop fraud before it starts.

• AI-Powered Invoice Validation: Automatically detects duplicates, mismatched data, and unusual amounts.
• Vendor Verification Workflows: Catches fraudulent vendors by verifying vendor details across network knowledge and third party databases.
• Audit Trails & Transparency: Tracks every invoice action, from upload to payment, for easy audit readiness.
• Segregation of Duties Built-In: Assigns roles and restricts access to ensure no one user controls the entire process.
• Real-Time Flagging of High-Risk Payments: Alerts your team before funds are released, not after the damage is done.

See how TRAILD can help you protect your AP function — Book a demo

Take the Next Step in Protecting Your AP Function

Accounts payable fraud isn’t just costly, it’s preventable. With the right tools and processes in place, your finance team can stay one step ahead of fraudsters, reduce risk, and take back control over every invoice, approval, and payment.

Whether you’re looking to streamline your AP workflows or implement intelligent fraud protection, Traild’s AP Automation platform delivers enterprise-grade visibility, control, and compliance — all in one solution.

And for businesses ready to take fraud prevention seriously, Traild’s AP Fraud Detection tools offer real-time flagging, audit trails, and AI-powered risk insights that help stop suspicious activity before it impacts your bottom line.

Frequently Asked Questions

What is accounts payable fraud?

Accounts payable fraud is a type of financial deception in which an individual, inside or outside the business, manipulates the AP process to receive unauthorised payments. This can involve fake vendors, altered invoices, or collusion with employees. Because AP teams handle high payment volumes, they’re often prime targets for fraud schemes.

What are the most common AP fraud schemes?

Common accounts payable fraud schemes include creating shell vendors, submitting duplicate or fake invoices, colluding with internal employees, manipulating check or wire payments, inflating expenses, and engaging in kickback arrangements. These schemes are often subtle and can go undetected without strong controls.

How can companies detect AP fraud early?

Early detection starts with recognising red flags such as sudden vendor detail changes, inconsistent invoice formats, or employees avoiding time off. Regular audits, segregation of duties, and real-time monitoring tools can all help identify accounts payable fraud risks before they escalate.

What are the consequences of accounts payable fraud?

The consequences of accounts payable fraud can be severe, ranging from financial losses and operational disruption to reputational damage, legal liability, and regulatory penalties. In many cases, recovering lost funds can be difficult or impossible, especially in cases of electronic payment fraud.

How can automation software help reduce AP fraud risk?

Accounts payable automation software helps reduce fraud risk by enforcing approval workflows, flagging anomalies in real time, detecting duplicate invoices, and tracking all activity through detailed audit trails. Solutions like Traild include vendor verification and AI-powered fraud detection tools to help businesses stop fraud before making payments.