KYC (know your customer)

Identity verification that regulated services must perform, typically a government ID check plus a selfie.

KYC obligations come from anti-money-laundering and telecom regulation: certain services must verify who their customers are before serving them. In the numbers business this surfaces as one-time ID checks for specific service-and-country combinations.

On MarioSMS, combinations that require it say so before you spend, and the check runs once through the identity partner Veriff, which retains the documents; the platform stores only the result.