15 Fraud Red Flags to Test for in Your Ledger
Spot signs of fraud and error in accounting data: duplicate payments, round amounts, sequence gaps, Benford anomalies, odd postings and vendor issues.
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Fraud in small and mid-sized businesses is often found by accident: a supplier's phone call, a bank query, a former employee. Data analytics lets you find it on purpose. Commonly cited estimates put occupational fraud losses around 5% of revenue for the typical organisation — treat that as indicative — and the same patterns recur.
Why people commit fraud
The fraud triangle has three parts: pressure (financial trouble, targets), opportunity (weak controls, trust without verification) and rationalisation ("I'll pay it back"). You can't control the first or third, but you can remove the second. See the internal controls checklist.
15 red flags and how to test for them
| # | Red flag | How to test |
|---|---|---|
| 1 | Duplicate payments | Same supplier and amount within days — Duplicate Transaction Finder |
| 2 | Missing or duplicated invoice numbers | Sequence Gap Finder |
| 3 | Unusual digit patterns | Benford's Law Analyzer |
| 4 | Amounts just below approval limits | Histogram of payments near the limit |
| 5 | Round-number payments | Count of amounts ending in 000 or 500 |
| 6 | Payments on weekends or holidays | Filter by posting date |
| 7 | Vendors with no TRN, address or phone | Vendor master review; check the TRN Validator |
| 8 | Vendor bank details changed shortly before a payment | Change log against payment dates |
| 9 | Vendor address matches an employee's | Compare master files |
| 10 | Journals posted by unusual users or at odd hours | Manual journal listing with user and time |
| 11 | Large round journals near period end | Review top journals by value in the last week |
| 12 | Credit notes without approval or after payment | Credit note listing and approver |
| 13 | Customer receipts not banked promptly | Compare receipt date to bank date |
| 14 | Employees on payroll with no leave, tax or access records | Payroll register vs HR and access list |
| 15 | Sudden margin or expense shifts | Ratio trends — Financial Ratio Calculator |
Behavioural signals
Data tells part of the story. Also watch for:
- Staff who never take leave or insist on handling a task alone.
- Reluctance to share records or to rotate duties.
- Lifestyle changes that don't match income.
- Close relationships with a particular supplier.
- Unexplained "adjustments" and reconciling items that never clear.
What to do when you find something
- Don't confront anyone first. Preserve evidence — copy the data, don't alter the source.
- Limit who knows. Involve the owner or board, and legal advice.
- Verify against source documents and the bank before concluding.
- Stop the leak — change access, payment approvals and bank mandates.
- Report as the law and your situation require, with advice from a lawyer or forensic accountant.
- Fix the control that failed.
Remember that anomalies often have innocent explanations — a duplicate may be a legitimate repeat, a Benford flag may be a price list. Treat each as a question to answer.
Building prevention in
The best protection is a system that enforces rules rather than relying on goodwill: role-based access, approvals, locked periods, system-generated numbering and a full audit trail. See audit trail in accounting software. Pyalm Books offers role-based permissions, transaction locking and a double-entry ledger, free during beta. For a deeper dive into one test, read Benford's Law for auditors and accountants.
Rules, rates and deadlines change. Confirm the current position with the Federal Tax Authority (tax.gov.ae), the Ministry of Finance or a qualified adviser before you file, pay or rely on it.