The Unified Payments Interface (UPI) is a system that combines many banking services, smooth fund routing, and merchant payments into a single mobile application (of any participating bank). The Unified Payments Interface (UPI) is a real-time payment system designed by the National Payments Corporation of India (NPCI) that allows both interbank peer-to-peer (P2P) and person-to-merchant (P2M) transactions. The Reserve Bank of India (RBI) regulates the interface, which works by instantaneously moving payments between two bank accounts on a mobile platform.