How does the receiver know into which account the money is deposited?

If you’ve sent money using a PhonePe registered mobile number or UPI ID, the money will be credited to the bank account that the receiver set as their primary bank account on PhonePe at the time of payment. The receiver can view the payment details within the History section of their PhonePe app to know into which account the money is deposited. 

If you’ve sent money to a non-PhonePe UPI ID, please ask the receiver to check the statement of the bank account that is linked to that UPI ID.