What is supplier due diligence?
Business Credit Reports
Answer
Supplier due diligence is the evidence-gathering process used to understand a supplier before and during a business relationship. It can cover legal identity, ownership, financial standing, delivery capability, compliance and security. Its scope should reflect the supplier’s role and risk. A completed questionnaire is an input, not proof that every risk has been resolved.
Verify the claims that would change your decision
Identify which facts matter to the contract, then use suitable independent sources or supporting documents. A company registry can support entity identification. Financial statements help assess financial position. Other risk types require their own evidence and checks.
- Match contract, invoice and registration details.
- Understand ownership and relevant connected entities.
- Confirm financial periods and material disclosure gaps.
Keep the review useful after onboarding
Save the evidence behind your decision, identify unresolved items and set review triggers. If a supplier’s ownership, status or delivery model changes, determine which prior conclusions need revisiting. Link the review to procurement and operational owners.
Illustrative example
A certificate does not answer every question
Illustrative scenario: a supplier submits a security certificate and a strong sales presentation. Neither establishes that the entity signing your contract has the financial capacity to deliver it. Verify the legal entity and review financial capacity separately from the security assurance.
What to check
- Claims that matter
- Independent evidence
- Unresolved gaps
- Ongoing owner and review plan
Frequently asked questions
How does due diligence differ from risk assessment?
Due diligence gathers and verifies evidence; risk assessment evaluates what it means for your relationship.
Is a questionnaire sufficient?
Not where material claims require independent verification or supporting evidence.
Should I check ownership?
Where relevant to control, group dependency, compliance or concentration.
Does registration prove a supplier is trustworthy?
No. It establishes recorded company facts, not general reliability.
Is bank verification included?
Treat bank account verification as a separate check unless specifically included and documented.
Is sanctions screening included?
Only where the agreed service explicitly covers it; a credit report alone is not sanctions clearance.
What if documents conflict?
Resolve the inconsistency before relying on the affected conclusion.
How much diligence is enough?
Use a proportionate scope based on contract risk and applicable requirements.
Should diligence continue after approval?
Yes. Material changes can invalidate earlier assumptions.
What evidence should I retain?
Relevant identifiers, sources, documents, dates, findings, decisions and approvals under your retention policy.
Sources & further reading
Source references support the definitions. Process suggestions and examples are editorial guidance.
- NPSA: supply chain due diligence
Broader supplier diligence extends beyond the financial review.
- UK Cabinet Office: supplier economic and financial standing
Public procurement guidance on assessing and monitoring supplier financial capacity.
Business Credit Reports provides commercial company information. Apply your organisation’s policy and appropriate specialist review. Suggest a correction.
For more detail: Supplier due diligence checklist →
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