Supplier due diligence
Vendor due diligence
Supplier due diligence is the proportionate investigation of a supplier's legal identity, ownership, financial position, integrity, capability, controls and compliance before or during a relationship.
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Simply put
What it means in ordinary work
It means checking who the supplier is and whether it can be trusted to deliver safely. The depth should match the value, risk and nature of the work.
Why it matters
Due diligence reduces fraud, bribery, sanctions, security and continuity risks. It also provides evidence that the organisation made a reasonable decision.
A hypothetical in practice
A hypothetical buyer checks a new IT supplier's company registration, beneficial ownership, sanctions exposure, security certification and financial statements. The checks are refreshed for a critical renewal.
Common pitfalls
A one-off check is not enough for a long or changing relationship. Set trigger-based and periodic reviews.
Collecting documents without assessing the findings creates a false sense of assurance.
Regional lens
How this lands where you work
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As-of date for date-sensitive regional content: 5 November 2026. Read the review policy.