Fraud proofing your business: 3 red flags every business owner should watch for
Fraud is one of those things most business owners assume will happen to someone else. It’s the kind of risk that feels distant until it lands on your desk, and by then, the damage is already done. The reality is that occupational fraud, fraud committed by the people within your own organisation, is far more common and far more costly than most leaders realise.
A research into 1,921 real fraud cases across 138 countries found that organisations lose an estimated 5% of their annual revenue to fraud each year, with a median loss of $145,000 per incident. More than half of all cases occurred because of a lack of internal controls or because existing controls were overridden. For a small or mid-sized business, that kind of hit can be devastating financially, operationally, and reputationally.
Most fraud stems from gaps in everyday processes rather than elaborate schemes, and those gaps are completely fixable once you know what to look for. Here are three red flags that should be on every business owner’s radar.
1. One person controls too much of the financial process
This is probably the most common setup in growing businesses, and it makes perfect sense at first. When your team is small, you rely on one trusted person to handle invoices, payments, and reconciliations. They know the systems inside out and everything runs smoothly. The problem is that when one person can raise a purchase order, approve the invoice, and process the payment without anyone else reviewing it, you’ve created a situation where mistakes and manipulation can both go unnoticed.
Separation of duties is the principle at the heart of fixing this. No single person should be able to initiate, approve, and complete a financial transaction on their own. In practice, this can look like requiring a second approver for any invoice above a certain threshold, or making sure the person who raises a purchase order isn’t the same person who approves the bill that comes in against it.
This is one of the areas where technology genuinely helps. Automated approval workflows build separation of duties into the process itself, so the right people review the right documents before anything gets paid. It takes the reliance off memory and good intentions and puts it into a structured process that works consistently.
2. You can’t easily trace how a payment was approved
Ask yourself this: if someone questioned a payment that left your business last month, could you pull up a clear record of who requested it, who reviewed it, who approved it, and on what basis? If the answer is “probably, but it would take a while” or “I’d need to check with a few people,” that’s a red flag.
A weak audit trail doesn’t just make life harder when something goes wrong. It creates the conditions for things to go wrong in the first place, because when people know there’s no clear record of their actions, the temptation to cut corners or push through questionable expenses grows significantly. It’s human nature.
This also matters hugely at audit time. External auditors need to see a clear trail from request to approval to payment, and when that trail is scattered across email threads, spreadsheets, and verbal sign-offs, the audit takes longer, costs more, and often surfaces issues that could have been avoided entirely.
The fix here is straightforward: move away from manual, informal approval processes and into a system that automatically captures every step. When every approval, rejection, comment, and delegation is logged in one place, you have a complete picture of how money moves through your business at any given moment. That kind of visibility doesn’t just protect you from fraud – it gives you confidence in your numbers.
3. Invoices arrive and get paid without anyone matching them to what was actually ordered
Fake invoice fraud is one of the most persistent threats facing UK businesses. The UK Government’s Economic Crime Survey 2024 found that it was the most common type of fraud experienced by businesses, affecting 11% of organisations surveyed. In certain sectors like information and communications, that figure climbed to 19%. These aren’t sophisticated cyberattacks. They’re invoices that look just legitimate enough to slip through a busy accounts payable process.
The way this typically works is simple. A fraudster sends an invoice for a service that was never provided, or sends a duplicate of a real invoice with slightly altered bank details, hoping it gets paid before anyone notices. In busy finance teams processing dozens or hundreds of invoices a week, it’s surprisingly easy for these to slip through, especially when there’s no systematic check matching the invoice back to an original purchase order.
Bill-to-PO matching – the practice of comparing every incoming invoice against the purchase order that triggered it – is one of the simplest and most effective defenses against this kind of fraud. When an invoice comes in that doesn’t match a PO, or where the amounts don’t line up, it gets flagged immediately rather than quietly going through to payment.
This kind of matching is difficult to do manually at scale, which is precisely why many businesses skip it or do it inconsistently. End-to-end AP automation can handle this automatically, checking invoices against purchase orders and flagging discrepancies before they reach the payment stage. It’s a small change in process that can save a business from significant losses.
Smaller businesses feel the impact most
Fraud doesn’t hit every business equally. While larger organisations tend to suffer bigger absolute losses, smaller businesses often feel the impact far more deeply as a percentage of revenue. They also tend to have fewer layers of oversight by nature – fewer people to separate duties between, less budget for dedicated compliance roles, and often a culture of trusting individuals to manage their own areas without much scrutiny.
A recent survey of nearly 2,500 companies across 63 countries found that procurement fraud ranked among the top three most disruptive economic crimes globally, and that close to a fifth of companies don’t use data analytics in any form to identify it. For smaller businesses without dedicated fraud teams, that gap between awareness and action is often even wider.
All of which means the red flags outlined above are especially relevant if you’re running a small or growing business.
The cost goes beyond money
When fraud happens inside a business, the financial loss is only part of the story. Trust within a team can break down quickly when someone discovers that a colleague has been manipulating expenses or diverting payments. It creates doubt – not just about the person involved, but about the systems that allowed it to happen.
Morale takes a hit too. People who have been working honestly start to question whether the business takes integrity seriously, and whether their own diligence even matters if someone else can game the system without consequence. Rebuilding that trust takes time and deliberate effort, and it rarely happens on its own. This is why prevention matters so much more than detection. By the time you’re dealing with a fraud case, you’re also dealing with the cultural fallout that comes with it.
What ties these red flags together
All three of these warning signs share a common thread: they’re about gaps in process rather than gaps in people. Most business owners trust their teams, and rightly so. The issue is that trust alone isn’t a control, and when processes rely on individuals doing the right thing every single time without any structural checks in place, you’re leaving the door open.
Prevention is always going to be more effective than detection after the fact. And prevention, in practical terms, means putting the right financial controls in place before a problem arises.
Culture matters just as much as controls
Strong financial controls are essential, but they work best when they sit inside a culture that takes integrity seriously. If people feel like the rules only apply to some and not others, or that raising concerns will be met with dismissal, no system in the world will fully protect you.
The businesses that are most resilient to fraud tend to be the ones where financial accountability is treated as everyone’s responsibility, not just the finance team’s. That means leadership setting the tone by following the same approval processes as everyone else, creating a safe space for employees to flag anything that feels off, and treating financial controls as something that protects the team rather than something that slows them down.
When people understand that these processes exist to support them and not to police them, compliance stops feeling like a burden and starts becoming part of how the business operates naturally.
Where to start
You don’t need to overhaul everything overnight. If any of the red flags above sound familiar, start with the one that feels most relevant to your business and work from there. A few practical steps that make a real difference:
- Review who currently has the authority to approve payments and whether there are adequate checks at each stage
- Look at how your invoices are processed and whether there is a consistent matching process in place
- Check whether you have a clear, accessible record of every financial approval made in the last six months
- Ask your team where they see gaps or workarounds in the current process – they often know before anyone else does
For many businesses, the shift from manual processes to automated approval workflows is the single biggest improvement they can make to their fraud resilience. It’s not about adding complexity. It’s about replacing scattered, informal processes with something structured and consistent that works without you having to think about it every day.
Final word
Every red flag in this article comes down to one question: could someone in your business approve, process, or pay something they shouldn’t without anyone noticing?
If the answer is yes, or even maybe, here’s what to prioritise. First, map out your current approval chain for invoices and payments and look for any point where a single person has full control. Second, check whether you have a reliable, searchable record of every approval decision made in the last quarter. Third, confirm whether incoming invoices are being matched against original purchase orders before they’re paid.
These three checks won’t take long, and they’ll tell you exactly where your biggest exposure sits. From there, it’s about closing those gaps with clear processes, whether that’s through automated approval workflows, tighter internal policies, or simply adding an extra set of eyes at the right stage.
The businesses that deal with fraud best aren’t the ones that never face it. They’re the ones that have already made it difficult to pull off.