What it means
Internal controls are designed to prevent fraud by ensuring that no single person has total control over a financial transaction. For example, one person might approve an invoice while another makes the payment.
However, these systems rely on the assumption that employees act independently. When two people decide to work together, they can easily bypass these safeguards.
This matters deeply because collusive fraud is notoriously difficult to detect through standard financial audits. Since both parties are covering their tracks, the paperwork often looks completely legitimate.
It can go on for years, draining company profits and undermining trust within the team. In practice, collusion frequently occurs in procurement, payroll, and expense management.
It might involve a purchasing manager secretly teaming up with a preferred supplier to inflate invoice prices, then splitting the extra money. It can also happen between two accounting staff members who agree to create ghost employees and divide the stolen wages.
Preventing collusion requires rotating job duties, enforcing mandatory leave, and maintaining a strong whistleblower culture. When staff know that processes are randomly audited and that colleagues frequently swap tasks, the temptation and opportunity to form secret agreements drop significantly.
In practice
Real-world examples.
Example
Our startup's purchasing manager and an external office supplier agreed to inflate invoices by twenty percent. They split the extra cash every month, bypassing our approval limits by keeping each fraudulent bill just below the threshold.
Example
At our regional bakery, the shift supervisor and the lead cashier secretly teamed up. They voided valid customer sales at the till at the end of the day and split the physical cash from the register, altering the daily reconciliation reports to match.
Example
In our mid-sized logistics firm, the warehouse manager and the inventory clerk conspired to write off expensive spare parts as damaged scrap. They quietly sold these items online for personal profit and falsified the stock disposal logs.
Think of it
“Imagine a bank vault that requires two different keys held by two different security guards to open. Security is strong because neither guard can access the money alone. Collusion is like those two guards becoming friends and deciding to open the vault together to empty it.
Case study
Seen in the real world.
At Apex Supplies, a growing distribution firm with fifty staff, the finance director and the accounts payable clerk formed a secret partnership. They created a fake vendor profile named Apex Consulting Services and submitted monthly invoices for advisory work that was never performed. Because the finance director had the authority to approve invoices up to ten thousand pounds, and the clerk processed the payments, they easily bypassed the normal dual-authorization checks required for new suppliers. Over eighteen months, they diverted one hundred and twenty thousand pounds of company funds into a shared private bank account. The fraud was only discovered when a new external auditor noticed that the phone number listed for the vendor matched the personal mobile number of the accounts payable clerk. Apex Supplies tightened their controls by introducing mandatory vendor verification checks and rotating accounts payable duties annually to stop this from happening again.
Watch out
Common mistakes.
- Assuming that having strict software approvals completely removes the risk of employee fraud.
- Failing to investigate unusual supplier price increases because the paperwork looks complete and signed off.
- Over-relying on close personal friendships and trust when assigning critical financial duties to staff.
Questions
People also ask.
How can small business owners spot collusion?
Look out for employees who resist taking holidays, live beyond their apparent means, or guard their work processes very closely.
Is collusion always illegal?
In business and finance, secret agreements to cheat companies, fix prices, or bypass controls are illegal and constitute fraud.
What is the best defense against collusive fraud?
Segregation of duties combined with regular job rotations, surprise audits, and independent verification of vendors.
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