HYDERABAD: The Aadhaar scam is turning curiouser. Investigations so far have revealed that Mohammed Ali , the data entry supervisor blamed for the scam, was terminated by Infrastructure Leasing & Financial Services Limited (IL&FS) in September 2011, but the fraud was perpetuated by data entry operators at 20 enrollment centres in the Old City. Also, more flaws in the enrollment process have come to light.Investigating officials grilling 22-year-old data entry supervisor Mohammed Ali of Vattepally in Falaknuma for enrolling 30,000 people in a span of just six months from 20 centres in the Old City discovered that he was actually sacked by his employer, IL&FS, in September last year. So, they started probing how Ali could enroll 30,000 people, including 870 in the physically-disabled category, after termination from service.They discovered that after his exit from IL&FS, enrolling agents at the 20 centers in the Old City had been using Mohammed Ali's login and password to carry on enrollments and these agents had committed the fraud. However, to upload the Aadhaar card details of an individual, the agent has to log in using a special ID, password and also authorise the details using his thumb impression in the biometric scanner.Ideally, the enrollment through Ali's ID should not have happened as he was not present at these centres to authenticate details using his fingerprints, but a flaw in the registration mechanism allowed them to carry out the fraud, a source said.The probe revealed that the operators at the 20 centers managed to upload details of 30,000 people by authorising them with their own fingerprints. “The system has a flaw. When an agent provides wrong authorisation fingerprint, it rejects on two occasions, but at the third instance it automatically takes the default authorisation print and completes the enrollment process,” a civil supplies department source said.The civil supplies department is the nodal agency for Aadhaar cards, being generated by the Unique Identification Authority of India (UIDAI) in the state.Probe agencies have realised that some IL&FS officials were in the know of things, but for reasons unknown, allowed the fraudulent enrollments to happen. On Saturday, a senior IL&FS official landed in the city to cooperate with the probe agencies. Police are likely to book cases against the firm’s staff soon.On Friday, police prepared a questionnaire asking UIDAI officers in Delhi about who had authorised the registration of 30,000 Aadhaar cards from the Old City under the name of Mohammed Ali when he was actually sacked. They also sought to know how the system had been accepting details of an individual without biometric authorisation.