How forensic practitioners plan allegation-driven fraud examinations, preserve evidence, perform targeted testing, conduct interviews, and report supported findings.
Fraud examination is different from a standard financial statement audit. A financial statement audit is designed to obtain reasonable assurance about the financial statements as a whole. A fraud examination is usually allegation-driven and is designed to determine what happened, how it happened, who was involved, what evidence supports the finding, and what loss or exposure resulted.
For AUD, the important point is that suspicion does not equal proof. Fraud examination methods identify leads, preserve evidence, corroborate facts, and support defensible conclusions.
flowchart TD
A["Allegation, red flag, or irregularity"] --> B["Define objective and scope"]
B --> C["Preserve records and chain of custody"]
C --> D["Develop fraud hypothesis"]
D --> E["Perform targeted testing and analytics"]
E --> F["Interview witnesses and relevant parties"]
F --> G["Corroborate or refute findings"]
G --> H["Report methods, evidence, limitations, and conclusions"]
| Phase | Purpose | Common evidence |
|---|---|---|
| Intake and triage | Understand the allegation, source, urgency, and potential exposure. | Hotline reports, complaints, management concerns, or audit findings. |
| Planning | Define scope, roles, legal involvement, procedures, and evidence preservation. | Engagement letter, legal instructions, investigation plan, and document hold notices. |
| Evidence preservation | Protect records from alteration, deletion, or loss. | Chain-of-custody logs, forensic images, document inventories, and access restrictions. |
| Targeted testing | Test transactions or records most likely to show the scheme. | Vendor files, journal entries, payroll records, invoices, bank records, and system logs. |
| Interviews | Gather explanations, timelines, admissions, and corroborating facts. | Interview notes, recordings when permitted, signed statements, and follow-up evidence. |
| Reporting | Communicate supported findings, limitations, and quantified effects. | Investigation report, exhibits, schedules, and recommendations. |
The scope should be specific. A request to “look for fraud” is too vague. A stronger objective identifies the suspected scheme, affected period, relevant systems, and intended use of the work.
Fraud testing is designed around a hypothesis. The hypothesis may change as evidence develops.
| Suspected scheme | Targeted procedure |
|---|---|
| Fictitious vendor | Compare vendor addresses, tax IDs, bank accounts, phone numbers, and ownership information against employee and public records. |
| Duplicate payment | Search for repeated invoice numbers, amounts, dates, purchase orders, or bank accounts. |
| Payroll ghost employee | Match payroll records to HR files, active employee listings, badges, direct-deposit accounts, and manager approvals. |
| Revenue cut-off manipulation | Inspect shipping, delivery, invoice, and cash receipt evidence around period end. |
| Management override | Analyze manual journal entries, late postings, round-dollar entries, and entries by privileged users. |
| Expense reimbursement fraud | Compare expense claims to receipts, calendars, travel records, card statements, and policy limits. |
Targeted tests produce leads. Each lead should be corroborated with source documents, external evidence, system logs, interviews, or other independent support.
Fraud interviews are usually staged. The investigator starts with neutral witnesses and background information before interviewing people more directly connected to the allegation.
| Interview practice | Why it matters |
|---|---|
| Use open-ended questions | Encourages narrative responses and reveals process details. |
| Avoid premature accusations | Reduces defensiveness and protects the investigation. |
| Ask follow-up questions | Tests consistency and fills gaps. |
| Corroborate statements | Interview comments are stronger when supported by records. |
| Document carefully | Notes should identify date, attendees, topics, and key statements. |
| Coordinate with counsel when needed | Legal privilege, employment law, and regulatory issues may affect the process. |
Nonverbal cues can be useful for planning follow-up, but they are not proof of fraud. The investigator should rely on corroborated evidence rather than body-language speculation.
Forensic work often supports discipline, insurance claims, civil litigation, criminal referral, or regulatory reporting. Evidence handling must be defensible.
| Evidence issue | Good practice |
|---|---|
| Chain of custody | Track who collected, held, transferred, and analyzed evidence. |
| Digital evidence | Preserve original media or forensic images and work from copies. |
| Emails and documents | Maintain metadata when relevant and avoid uncontrolled forwarding. |
| System logs | Capture logs before retention periods expire. |
| External confirmations | Use independent sources when internal records may be compromised. |
| Workpapers | Separate facts, assumptions, analysis, and conclusions. |
The exam trap is treating ordinary audit documentation as enough for legal use. Forensic evidence may require more precise preservation and traceability.
A fraud examination report should state what procedures were performed, what evidence was obtained, what limitations existed, and what conclusions are supported. It should avoid unsupported legal conclusions.
| Reporting item | What to include |
|---|---|
| Objective and scope | Allegation, period, entities, systems, and intended users. |
| Procedures | Documents reviewed, data tests performed, interviews conducted, and external corroboration obtained. |
| Findings | Facts supported by evidence, not speculation. |
| Quantification | Loss estimate, unsupported amounts, or exposure range when supportable. |
| Limitations | Missing records, scope limits, unavailable witnesses, or unresolved issues. |
| Recommendations | Control improvements or remediation steps, when within scope. |
The investigator should distinguish a supported finding from a suspicion, anomaly, or unresolved question.
Use this sequence for fraud examination questions: