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Related Party Fraud

Related party fraud happens when someone inside a business steers company money towards a person or organisation they are secretly connected to, such as a supplier owned by a director's spouse. Dealing with a related party is not illegal in itself; the fraud lies in hiding the connection and in the inflated, unnecessary or entirely fictional transactions that follow.

Because the payments look like ordinary trading in the ledger, this type of fraud can run for years before anyone questions it.

What it means

A related party is any person or entity that can influence, or is influenced by, the business: directors, major shareholders, close family members, and companies those people control. Legitimate related party transactions happen constantly, and accounting rules simply require them to be disclosed so readers of the accounts can judge whether the terms were fair.

Fraud enters when the relationship is concealed and the terms are not fair. Typical patterns include a purchasing manager routing orders through a company owned by a relative at 30% above market price, or a director selling a personally owned building to the business at a valuation nobody independent ever tested.

The reason it matters commercially goes well beyond the money taken. Undisclosed related party dealings distort reported profit, mislead lenders and investors, and can breach loan covenants or listing rules, which turns a control failure into a legal and reputational problem.

Detection relies on joining information that usually sits in separate places. Comparing the supplier master file against employee addresses and bank details, checking company registry records for shared directors, and reviewing suppliers approved outside the normal process all surface connections that no single system would reveal.

Prevention is mostly about routine rather than suspicion. A signed annual declaration of interests, mandatory competitive quotes above a set value, segregation between the person who approves a supplier and the person who approves payment, and an audit committee that actually reviews the related party disclosures all raise the effort required to hide a connection.

The nuance worth remembering is that the accounting profession treats related party balances as a high risk area precisely because the usual audit evidence is weak. An invoice from a connected supplier looks exactly like any other invoice, so auditors have to test the substance of the relationship instead of the paperwork.

In practice

Real-world examples.

1

Example

A facilities manager at a hospital trust awards a five year cleaning contract worth $840,000 a year to a company registered at his brother-in-law's address. No competitive quotes are held on file, and the discovery comes only when a rival bidder queries how the contract was awarded.

2

Example

A family owned manufacturer buys all its raw plastic from a trading company owned by the founder's daughter at a 12% mark-up over the market rate. The arrangement is legal but undisclosed, and the bank reprices the company's lending once the related party note appears in the audited accounts.

3

Example

A finance director sets up a consultancy company in a spouse's maiden name and raises quarterly invoices of $18,000 for advisory work that is never performed. The scheme is uncovered when a new accounts payable clerk notices the supplier has no website, no VAT number and a bank account matching one already on the payroll file.

Think of it

Related party fraud uses connected companies to manipulate-hiding things with affiliates.

Case study

Seen in the real world.

This is an illustrative and entirely fictional account. Calderstone Precision, an invented engineering group with $60,000,000 of revenue, ran a tooling budget of about $4,000,000 a year, most of it spent with a single specialist supplier that had held the account since before the current board joined.

In this fictional story, a routine data review matched supplier bank details against the payroll file and found that the tooling supplier shared an account with the operations director's partner. A price benchmark showed Calderstone had been paying roughly 25% above the going rate for eight years, an overpayment in the region of $6,000,000.

The imagined board recovered part of the loss through an insurance claim and a settlement, but the harder consequence was the restatement of prior year accounts and the loss of a major customer that had its own supply chain integrity rules. Calderstone's fictional response was an annual conflict of interest declaration for every manager with purchasing authority, plus automated matching of supplier and employee details every month.

Watch out

Common mistakes.

  • Assuming a related party transaction is automatically fraudulent, when most are legitimate and simply need disclosure and an arm's length price.
  • Relying on a one-off declaration of interests signed when someone joins, rather than refreshing it annually as relationships and side businesses change.
  • Focusing only on suppliers, when related party fraud is just as common in customer discounts, employment of family members and sales of company assets at below market value.

Questions

People also ask.

What does arm's length actually mean?

It means the transaction is priced and structured as it would have been between two unconnected parties, which is usually demonstrated with independent quotes or a third party valuation.

Which controls give the best return for a small business?

Requiring two independent quotes above a set value and separating supplier setup from payment approval catch the majority of schemes at very little cost.

Do auditors specifically look for this?

Yes, related party transactions are treated as a significant risk area in every audit, and auditors will ask management directly for a complete list and then test it against other records.

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Last updated · September 4, 2026
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