The Delhi High Court on Thursday suggested incorporating recommendations, like using OTP authentication instead of biometric, given by two amicus curiae to plug a "loophole" in the Aadhaar verification system that had been misused by a mobile shop owner to issue fresh SIM cards in the name of unwary customers for use in fraudulent activities.

The shop owner, during Aadhaar verification of a SIM, used to make the customer give his thumb impression twice by saying it was not properly obtained the first time and the second round of authentication was then used to issue a fresh connection which was handed over to some third party, the high court had earlier noted while initiating a PIL on the issue. A bench of Chief Justice Rajendra Menon and Justice I S Mehta, on Thursday, took on record the report submitted by senior advocate Dayan Krishnan and advocate Rushab Aggarwal who were appointed as amicus in the case to assist the court. The bench also asked the Centre, Delhi government and the Unique Identification Authority of India (UIDAI) to file their response to the report and listed the matter for hearing on February 12.