Fraud Risk Assessment: Connecting Schemes, Controls, and Financial Exposure

A practical, evidence-based approach to identifying how fraud could occur—and whether an organization would detect it.

Why Conventional Fraud Risk Assessments Fall Short

A fraud risk assessment should answer a more demanding question than whether the organization has a fraud policy, a whistleblower hotline, or an annual control certification. It should identify how someone could exploit a particular business process, what conditions would permit the scheme to succeed, and whether the organization would recognize the activity before significant harm occurred. A control inventory can be useful, but it is not a substitute for understanding how fraud could actually be committed and concealed.

I have seen the practical difference between reviewing a control on paper and examining the transactions it is intended to govern. An approval matrix may appear comprehensive, yet it provides limited protection if unauthorized personnel can alter vendor records, approval evidence can be fabricated, or exceptions are routinely accepted without independent challenge. The assessment must therefore examine both control design and operating effectiveness, including the possibility of collusion and management override.

A credible assessment also distinguishes fraud risk from ordinary process failure. Errors and control deficiencies matter, but fraud involves intentional conduct. Assessors should evaluate plausible methods of concealment, access to assets and information, incentives and pressures, and opportunities created by weak oversight. The goal is not to accuse employees of wrongdoing. It is to identify vulnerabilities before someone exploits them.

Begin With the Scheme, Not the Checklist

A useful fraud risk assessment starts with the organization’s actual activities: how revenue is generated, how funds are disbursed, how financial results are reported, and where decisions or approvals are concentrated. The assessment team then develops plausible fraud scenarios for significant processes, including who could initiate the activity, what records might be manipulated, how the transaction could be approved, and how the scheme might remain undetected.

Consider a fictitious-vendor scheme. An employee with access to the vendor master file could create a vendor record, direct payments to a controlled bank account, submit invoices for services never provided, and exploit weaknesses in receiving or approval controls. A conventional assessment might label this simply “accounts payable fraud.” A scheme-based assessment goes further: it identifies the exact control points that must fail, the data that could reveal the activity, and the independent evidence needed to determine whether suspicious transactions are legitimate.

The same approach applies to payroll, procurement, expense reimbursement, financial reporting, and revenue-related transactions. The more precisely the organization describes a plausible scheme, the more effectively it can select controls and analytical tests that address the underlying exposure.

Figure 1. A Scheme-Based Fraud Risk Assessment Model

The model below begins with the business process and follows the risk through scheme development, exposure assessment, control evaluation, targeted testing, and governance action. It is intentionally iterative: findings from testing and investigations should change the organization’s understanding of fraud risk, rather than remain isolated within individual audit reports.

Assess Inherent Risk Before Crediting Controls

Once plausible schemes have been identified, the organization should evaluate their inherent risk: the potential significance of the scheme before considering the effectiveness of existing controls. The assessment should consider potential financial impact, access to assets or sensitive systems, transaction volume, susceptibility to concealment, and the nature of the business environment. Historical incidents and industry information can inform the analysis, but an absence of previously detected fraud should not be treated as evidence that exposure is low.

Risk scoring can improve consistency, provided the underlying assumptions are transparent. A five-point likelihood scale and five-point impact scale may be useful for prioritization, but their numerical product should not be mistaken for a precise estimate of fraud probability or expected loss. Different schemes with the same score may warrant different responses because of regulatory consequences, reputational exposure, or the possibility of senior-management involvement.

The objective is to identify the schemes that deserve deeper evaluation and to explain the rationale for those decisions. Professional judgment remains essential, particularly where available data are incomplete or the consequences of a relatively unlikely event could be severe.

Figure 2. Illustrative Fraud-Risk Prioritization Matrix

This illustrative matrix is a prioritization aid, not a statistical prediction. Scores reflect hypothetical likelihood and impact ratings on five-point scales. Organizations should define the meaning of each rating, document their assumptions, and adjust priorities when qualitative factors justify doing so.

Evaluate Whether Controls Would Actually Interrupt the Scheme

After establishing inherent exposure, assess the controls that are supposed to prevent or detect the scheme. Preventive controls may include independent vendor validation, segregation of duties, restricted system access, dual authorization, and verification of changes to payment instructions. Detective controls may include exception reporting, bank-account comparisons, reconciliations, audit-log reviews, and targeted investigation of unusual transactions. The central question is whether these measures would work against the specific method of misconduct being considered.

Control design should be tested against realistic circumstances. Could the same employee create a vendor and approve its invoices? Could a manager override a threshold without independent review? Are vendor banking changes verified through a trusted channel, or merely accepted from the same communication that requested the change? Do reviewers receive enough information to identify suspicious patterns, or do they approve individual transactions without visibility into related activity?

Residual risk is the exposure remaining after the effectiveness of controls is considered. A control should receive credit only to the extent that its design and operation are supported by evidence. Policies, signatures, and system settings may demonstrate an intended process, but transaction testing, access reviews, and examination of exceptions are often necessary to establish whether the process is functioning as intended.

Translate Risk Scenarios Into Analytical Procedures

Fraud risk assessment becomes more valuable when its findings influence what the organization actually monitors. If the identified scheme involves fictitious vendors, the response should include tests that examine vendor creation, banking changes, payment activity, employee-vendor relationships, and approval histories. If the scheme involves manipulation of financial results, the response may include analysis of unusual journal entries, period-end adjustments, reversals, manual overrides, and transactions lacking appropriate support.

Analytical exceptions are indicators, not findings of fraud. A vendor sharing an address with an employee may have a legitimate explanation, and a round-dollar payment may be entirely appropriate. Investigators must evaluate the underlying documentation, business purpose, authorization, and relevant relationships before drawing conclusions. Nevertheless, systematic analysis of complete transaction populations can reveal patterns that periodic sampling may overlook, particularly when several individually explainable conditions occur together.

Figure 3. Connecting Fraud Schemes to Targeted Tests

The table below shows how the assessment can produce specific procedures rather than generic recommendations to “strengthen controls.” It is illustrative and should be tailored to the organization’s systems, policies, and risk profile.

Figure 3. Examples for discussion, not a complete audit program or evidence of misconduct.

Management Override, Collusion, and Governance Exposure

Some of the most consequential fraud risks arise when individuals with authority can bypass the controls they are responsible for enforcing. Management override and collusion can defeat otherwise reasonable segregation-of-duties arrangements, particularly when documentation is fabricated or independent review is ineffective. A comprehensive fraud risk assessment must therefore consider not only process-level weaknesses but also the tone, incentives, reporting channels, and governance arrangements that influence how concerns are handled.

This is where the role of the Audit Committee becomes particularly important. Allegations involving senior management should have a reporting and escalation path that does not depend on the individuals whose conduct may be under review. Investigative independence, timely preservation of evidence, and access to appropriate legal and forensic expertise are critical when ordinary management reporting channels may be compromised.

The assessment should also consider whether employees believe they can raise concerns without retaliation and whether reported issues are evaluated consistently. A hotline may exist, but its effectiveness depends on trust, confidentiality safeguards, appropriate triage, and a demonstrable willingness to act on substantiated concerns.

A Practical Implementation Approach

A useful first phase is to select a limited number of significant processes and develop a scheme inventory through interviews with process owners, review of prior incidents and audit findings, examination of transaction flows, and consideration of relevant external fraud patterns. Finance, Internal Audit, Compliance, Information Technology, Human Resources, and Legal may each provide important perspectives. The assessment team should document the process boundaries, key systems, access rights, and points at which transactions can be initiated, modified, approved, or concealed.

The next phase is to score inherent risks, map preventive and detective controls to the schemes, and test the controls that matter most. This may involve walkthroughs, user-access reviews, sample-based examination of approvals, and data analysis across full transaction populations. Significant gaps should be assigned to accountable management owners, with corrective actions, target dates, and evidence required to demonstrate remediation.

Finally, the assessment should become a recurring management and governance process. Material organizational changes, acquisitions, system implementations, new payment channels, regulatory developments, and substantiated incidents may all justify revisiting the risk inventory. Internal Audit can provide independent assurance over the design and effectiveness of the program, while management remains responsible for owning fraud risks and implementing controls.

What Boards and Audit Committees Should Ask

Boards and Audit Committees should expect more than a heat map and a statement that fraud risk is being monitored. They should understand which plausible schemes present the greatest exposure, why those risks were prioritized, what evidence supports the evaluation of controls, and how management knows whether corrective actions are working. They should also understand the limitations of the assessment, including gaps in data, areas excluded from scope, and risks involving management override or third-party relationships.

A useful discussion should address whether the organization has identified the most significant fraud scenarios; whether controls would prevent or detect those scenarios; whether analytics are producing actionable information; whether investigations are handled independently; and whether recurring exceptions influence the organization’s risk assessment and audit priorities. These questions connect fraud prevention to governance rather than treating it as a periodic compliance exercise.

Conclusion

A fraud risk assessment is most effective when it is grounded in the way the organization actually operates. Identifying generic categories of fraud is a starting point, but meaningful risk reduction requires a more disciplined examination of plausible schemes, control vulnerabilities, methods of concealment, and the evidence that would reveal suspicious activity.

The value of the process is not measured by the number of risks entered into a register. It is measured by whether management understands the exposure, whether controls are designed and operating to address it, and whether emerging evidence leads to timely action. For Internal Audit and the Audit Committee, that creates a stronger foundation for prioritizing assurance, challenging unsupported conclusions, and evaluating the effectiveness of the organization’s anti-fraud program.

An effective fraud risk assessment should do more than describe where fraud might occur. It should help the organization determine how it could happen, why it might go undetected, and what needs to change.

Professional References