Vendor Proof Index is a procurement-grade reference for sourcing vendor-verification, KYB (Know Your Business), due-diligence, and sanctions-screening vendors. Understand every service category, learn exactly what to verify before you retain a provider, request sourcing help, and explore a reference to notable real vendors in the space. Procurement support, not legal, compliance, or investment advice. This site does not itself perform verification.https://vendorproofindex.com/en-ushttps://vendorproofindex.com/guides/supplier-verification/https://vendorproofindex.com/guides/supplier-verification/What a real supplier verification process covers: business registration, ownership, financial stability, and sanctions screening, plus a buyer checklist and RFP questions.https://vendorproofindex.com/guides/vendor-background-check/https://vendorproofindex.com/guides/vendor-background-check/What a vendor background check actually investigates, when to use a managed due-diligence firm instead of a self-serve API, and RFP questions for choosing a provider.https://vendorproofindex.com/guides/vendor-verification/https://vendorproofindex.com/guides/vendor-verification/What vendor verification actually checks, self-serve platforms vs. managed services, and RFP questions for choosing the right vendor-verification provider.https://vendorproofindex.com/guides/know-your-business-kyb/https://vendorproofindex.com/guides/know-your-business-kyb/What Know Your Business (KYB) verification actually covers, how it differs from KYC, the regulatory frameworks behind it, and how to evaluate a KYB provider.