KYC, know your customer, is the regulatory obligation on financial institutions to verify the identity of the customers they onboard. For payments it appears twice: acquirers must verify the merchants they board, checking corporate documents, ownership, licences and websites, and merchants in some verticals must in turn verify their own users.
Why it matters
KYC is why merchant onboarding asks for beneficial ownership documents, why a corporate restructure can freeze your settlement, and why “know your customer’s customer” reviews keep reaching further down the chain. For high risk merchants the practical rule is that underwriting never really ends: the file you submitted at boarding is re checked whenever your volume, vertical or corporate structure changes. Keeping a current, consistent KYC pack ready, the same answers everywhere, is one of the cheapest ways to make every acquirer conversation faster.