UPI is a single window mobile payment system launched by NPCI that allows users to instantly transfer money between bank accounts using only a virtual payment address. It eliminates the need for users to enter sensitive bank details with each transaction. To use UPI, a user simply downloads a participating bank's app, registers with their bank account details and virtual ID, then can make or receive payments by providing only this virtual ID to the payee. This simplifies payments and promotes a cashless economy.
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