Fraud risks: schemes, controls, and the auditor’s role
Fraud risk concerns intentional deception, such as fictitious suppliers or manipulated results. Internal audit considers exposure and evaluates the organization’s response, but it does not guarantee that every fraud will be detected. A red flag is a reason to investigate appropriately, not a finding of guilt.
Connect the scheme to a useful control
| Decision | How to apply it | Mistake to avoid |
|---|---|---|
| Fictitious supplier | Separate supplier setup from payment release and independently validate new suppliers. | Relying only on the employee who created the supplier to confirm it is legitimate. |
| Manipulated performance | Challenge unusual period-end adjustments and reconcile reports to underlying records. | Accepting an improved headline number without looking for changed definitions. |
| Concealment | Use independent reconciliations and secure reporting channels to surface inconsistencies. | Assuming a lack of complaints proves that fraud risk is low. |
Fictitious supplier
Separate supplier setup from payment release and independently validate new suppliers.
Avoid: Relying only on the employee who created the supplier to confirm it is legitimate.
Manipulated performance
Challenge unusual period-end adjustments and reconcile reports to underlying records.
Avoid: Accepting an improved headline number without looking for changed definitions.
Concealment
Use independent reconciliations and secure reporting channels to surface inconsistencies.
Avoid: Assuming a lack of complaints proves that fraud risk is low.
A decision path you can use
- 1Identify an opportunity for deception
- 2Assess prevention and detection
- 3Follow the authorized response process
Understand the method
Work through the reasoning
Separate intentional deception from error and suspicion
Fraud involves intentional deception; an error may produce a similar accounting or operational result without that intent. A duplicate payment, for example, could arise from a processing mistake, a system interface defect, or deliberate manipulation. The visible anomaly is a reason to investigate. It is not, by itself, proof of which explanation is correct.
Use precise language while gathering evidence. Describe the duplicate transaction, related user actions, and missing approvals before alleging a scheme. Preserve records and follow the authorized response process. Premature accusations can damage the investigation and the people involved, while dismissing the anomaly as “probably a mistake” can leave a serious exposure unexamined.
Understand the mechanism of a possible scheme
A useful fraud-risk assessment explains how someone could obtain a benefit, conceal the act, and exploit a process. A fictitious supplier scheme might combine access to vendor creation, invoice approval, and payment instructions. Financial reporting manipulation might instead exploit estimates, unusual adjustments, or pressure around a reporting target. The controls and evidence needed differ with the mechanism.
Pressure, opportunity, and rationalization are useful prompts for thinking about risk. They are not a diagnostic test that proves an individual committed fraud. A demanding target may create pressure, but many people under pressure act honestly. Look for process vulnerabilities, incentives, and available evidence without converting general risk factors into a conclusion about a person’s intent.
Combine prevention, detection, and a credible response
Preventive controls reduce the opportunity for a scheme before it occurs, such as independent vendor verification and restrictions on incompatible access. Detective controls identify signals after or during activity, such as matching payment details or investigating unusual overrides. Neither type is sufficient merely because it exists on a controls inventory; it must address the scheme and operate effectively.
A detection rule without an owner, investigation process, or escalation route can generate reports without reducing exposure. Consider whether alerts are reviewed, whether significant matters reach appropriate decision makers, and whether retaliation concerns inhibit reporting. Evaluate the whole response chain. A low alert count could reflect low risk, poor rule design, incomplete data, or a reporting channel that people do not trust.
Keep management ownership and audit responsibilities clear
Management owns fraud-risk management and the design and operation of its controls. Internal audit evaluates those arrangements and considers fraud risk when planning and performing work. This role requires appropriate competence and professional skepticism, but it does not make every auditor a forensic investigator or promise that every concealed scheme will be discovered.
When information suggests possible fraud, use established procedures for reporting, evidence protection, and specialist involvement. Avoid alerting a potentially involved person through an improvised confrontation. The next step depends on the mandate, seriousness, and facts. Audit can identify weaknesses and evaluate responses while preserving the distinction between independent assessment and management’s responsibility to operate the prevention program.
Original teaching example
Apply the method to a decision
The scenario
One employee can create suppliers, change bank details, and release payments. No unusual payments have yet been found.
The decision
Report the concentration of incompatible duties as a control exposure; do not accuse the employee of fraud.
The ability to exploit a process is evidence of opportunity, not proof of an intentional act. A response might separate duties, validate bank changes independently, and add monitoring. Investigation decisions require evidence and appropriate authority.
Independent hypothetical case. It is not an official IIA question, an actual investigation, or a scoring prediction.
A second application
An impressive dashboard hides an unreviewed exception queue
The situation
A payment-monitoring system generates alerts for shared bank accounts among suppliers. The dashboard reports that the rule runs daily, but no one has reviewed the last six weeks of alerts.
Reason through it
The rule’s execution shows that a detection activity occurs. It does not show that suspicious patterns are evaluated or acted on. Audit should assess alert quality, the backlog’s risk, assigned responsibilities, and escalation arrangements. Shared accounts may have legitimate explanations, so the backlog is not a count of proven frauds.
Take the decision
Report the breakdown in the detection-and-response process, assess urgent exposure, and obtain a management-owned corrective plan with evidence of actual review.
Original hypothetical teaching case.
Check your understanding
Choose the best answer, then check the reasoning for each alternative. These short learning checks are not a full exam simulation. Answers are not saved or sent.
Questions about this topic
Must internal audit personally investigate every suspected fraud?
No. Its role depends on the mandate, competence, and authorized investigation procedures. Preserve relevant information and involve the appropriate specialists instead of assuming an unlimited investigative role.
Does the fraud triangle prove that fraud occurred?
No. It helps identify conditions associated with fraud risk. Establishing what happened requires evidence; pressure, opportunity, or rationalization alone is not proof of a scheme or a person’s intent.
Sources and syllabus scope
Prepared by MiloPrep editorial team. Source links checked 2026-10-10. These notes and cases are independent teaching material; the IIA sources do not verify or endorse them.
- IIA expanded syllabus
Establishes the examined topics. Primary domain: Fraud Risks (15% of Part 1). This is a domain allocation, not a separate weight for this lesson.
- Global Internal Audit Standards reference
- Locator: Standards 4.2, 4.3, and 13.2. Supports the professional requirements cited here; our scenarios and solution steps are original applications. Current IIA Standards resources.
Part 1: Internal Audit Fundamentals. Selected learning notes, not complete curriculum coverage. Browse all CIA topics.