Trust people until they give you a reason not to.
It sounds generous. Civilized. Even moral.
Unfortunately, when it comes to fraud—and to many of the worst betrayals in life—that advice fails at the exact moment it matters most.
In my career investigating financial crimes, I learned a hard truth early on: the people most likely to defraud you are rarely strangers. They are the people you already know. The people you rely on. The people you trust.
And by the time they “give you a reason not to,” the damage is already done.
Why Accounting Fraud Rarely Comes From the Outside
When companies imagine fraud risk management, they often picture an outsider hacking systems or forging documents. That image is comforting, because outsiders are easier to guard against.
Reality is far less comfortable.
The vast majority of serious frauds are committed by insiders—employees, executives, partners, trusted advisors. People with access. People with credibility. People whose behavior has never given anyone reason to worry.
This isn’t accidental. It’s structural.
Fraud thrives where trust already exists.
What is the Fraud Triangle
Early in my career, I was introduced to a framework that explains this dynamic with unsettling clarity. In my Wiley textbook, A Guide to Forensic Accounting Investigation, I devote significant attention to it because it shows up in case after case.
It’s known as the Fraud Triangle.
The fraud triangle is a diagram depicting the three elements that must be present for fraud to occur:
- Need (or pressure)
- Opportunity
- Rationalization
Remove any one of these, and fraud typically doesn’t happen. When all three align, even people who once seemed trustworthy can make catastrophic choices.
Let’s look at each.
Need: The Pressure No One Sees
Fraud almost always begins with pressure.
Financial pressure. Career pressure. Family pressure. Ego pressure.
It might be mounting medical bills, a failing business, a gambling problem, a divorce, or the quiet fear of being exposed as less successful than everyone believes.
What makes need so dangerous is that it’s often invisible.
The person under pressure doesn’t announce it. They compartmentalize it. They continue showing up as the reliable colleague, the trusted CFO, the longtime controller who’s “always been solid.”
From the outside, nothing looks different.
From the inside, desperation is forming.
Opportunity: Access Disguised as Trust
Opportunity is where trust becomes dangerous.
Opportunity exists when someone has: access to assets or systems, authority without oversight, familiarity with controls, and how to bypass them.
In other words, opportunity exists precisely because someone is trusted.
Long tenure. Minimal supervision. A reputation for reliability.
These are not red flags in most organizations. They’re badges of honor.
Yet in investigation after investigation, those same qualities create the opening fraud requires.
People don’t exploit systems they can’t access. They exploit the ones built for them.
Rationalization: The Lie That Makes It Possible
Rationalization is the most misunderstood part of the triangle.
Few people wake up intending to become criminals. Instead, they tell themselves stories:
- I’m just borrowing it.
- I’ll pay it back once things stabilize.
- I deserve this after all I’ve done.
- The company can afford it.
Rationalization allows someone to preserve their self-image while crossing ethical lines.
And here’s the part many find uncomfortable: rationalization often sounds reasonable—especially to the person making it.
That’s why fraud can persist for years. For a specific example of the Fraud Triangle at work in a real case I worked on, read my article: How Ordinary People Rationalize Extraordinary Crimes.
Why Trust Without Verification Fails
When we’re taught to trust first and verify later, we unintentionally reverse the order that protects us.
Verification isn’t about suspicion. It’s about structure.
Healthy organizations—and healthy relationships—separate trust from unchecked access. They design systems assuming that pressure, opportunity, and rationalization can coexist in any human being under the right conditions.
That’s not cynicism.
That’s realism.
The Lesson Most People Learn Too Late
In nearly every fraud case I’ve investigated, someone eventually says the same thing:
I never would have suspected them.
That statement isn’t evidence of innocence. It’s evidence of misplaced trust.
The tragedy is that the signs were often there—not as behavioral red flags, but as structural ones: too much access, too little oversight, too much reliance on one person.
Fraud doesn’t require bad people.
It requires human pressure, human access, and human justification.
Final Thought
Trust is essential to functioning societies and organizations. But blind trust—especially when paired with access and authority—is an invitation to harm.
The wiser lesson isn’t trust until proven otherwise.
It’s this:
Trust people—and design systems that don’t depend on trust alone.
That lesson cost many people their savings, their companies, and their peace of mind.
I learned it by investigating the aftermath.
Tom Golden
