Due Diligence
Also known as: Supplier due diligence
Due diligence is the process of investigating a supplier's legitimacy, capability and risk before entering into a business relationship.
Supplier due diligence checks that a vendor is a real, registered business that is financially sound, compliant, and free of red flags such as sanctions, litigation or ownership concerns. Its depth scales with risk — a strategic, high-spend supplier warrants more scrutiny than a low-value one.
Due diligence is part of onboarding and should be refreshed periodically, since a supplier's situation can change. Marketplaces reduce the burden by vetting suppliers centrally, so buyers inherit that assurance rather than repeating checks for every relationship.
Frequently asked questions
- What is supplier due diligence?
- Due diligence is investigating a supplier's legitimacy, financial health, compliance and risk before doing business — confirming they are a real, sound and compliant company.
- How much due diligence is enough?
- It should scale with risk: high-spend or strategic suppliers warrant deeper checks, while low-value suppliers need lighter verification. It should also be refreshed periodically.
Related terms
Supplier Onboarding
Supplier onboarding is the process of collecting, verifying and recording the information needed to trade with a new supplier before the first order is placed.
Read definitionApproved Vendor List (AVL)
An approved vendor list (AVL) is the register of suppliers that have been vetted and authorised for an organisation to buy from.
Read definitionAnti-Bribery & Corruption (ABC)
Anti-bribery and corruption (ABC) refers to the policies and controls that prevent improper payments and undue influence in business dealings, including procurement.
Read definitionData Protection (PDPA)
Data protection under the PDPA is the set of legal obligations governing how organisations collect, use, store and share personal data in commercial transactions.
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