The UPI hit a milestone of 16.6 billion transactions in a month in October, with improvements in its capabilities like successful instant debit reversals at 86 per cent (77 per cent in the same month last year). The UPI hit a milestone of 16.6 billion transactions in a month in October, with improvements in its capabilities like successful instant debit reversals at 86 per cent (77 per cent in the same month last year). Zee News :Business