What is the UPI number?

A UPI PIN is a unique four or six-digit code essential for confirming all bank transactions within the Unified Payments Interface (UPI) system. UPI is a real-time payment system developed by the National Payments Corporation of India, enabling instant bank-to-bank transfers via smartphones. The UPI PIN ensures secure transactions and is the number you enter to authorize payments on UPI-enabled apps like Paytm.