Gpay: Open the app, scroll to "See transaction history," tap the specific payment. The UPI transaction ID (or alphanumeric ID) is located under the payment details.
PhonePe: Tap History at bottom right, select the transaction, look for the UPI Transaction ID under "Transfer Details".
Paytm: Tap 'Balance & History', select the transaction. The unique UPI reference number is listed under the transaction details.
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