Due Diligence
The reasonable investigation a prudent person conducts before entering a financial transaction or business relationship, to verify claims and identify risks.
Also known as: DD, KYC, know your counterparty
Last reviewed: 10 June 2026
Due diligence is the standard of care and investigation that a reasonable person is expected to undertake before committing money or entering a contract. In an investment context it means independently verifying the firm's authorisation (e.g., via the FCA register), the investment's ownership structure, audited financials, and the identity of principals. In a consumer context, it might mean checking a seller's reviews, confirming a charity's registered number, or verifying a contractor's licence before paying a deposit.
Scammers deliberately create time pressure, false social proof, and emotional urgency to prevent due diligence. Phrases like 'this offer closes tonight' or 'other buyers are waiting' are designed to short-circuit rational investigation. Legitimate opportunities can almost always withstand a 48-hour verification pause.
In legal and regulatory contexts, failing to conduct adequate due diligence can reduce or eliminate a consumer's entitlement to regulatory compensation. For example, a UK Financial Ombudsman ruling may reduce an APP fraud reimbursement if the victim took an obvious, undue risk that a careful person would have avoided. Understanding what basic due diligence looks like for a given transaction is therefore both protective and legally significant.
Examples
- Before transferring £50,000 to an investment opportunity, a consumer checks the firm on the FCA register, calls the FCA consumer helpline to confirm the name, and reads independent reviews — finding the firm is a clone.
- A job applicant researches a remote employer on LinkedIn and Companies House before paying a 'training fee', discovering the company does not exist.