NEW DELHI: While Aadhaar was conceived as an identity proof, and not as proof of citizenship, allowing onboarding without real scrutiny, recent moves have meant that only verified adults can enrol for the unique ID. Besides, the Unique Identification Authority of India (UIDAI) is going to tap the online database for passport, ration cards, and birth and matriculation certificates in the future for enrolment of adults and also for updates to ensure that Aadhaar remains foolproof.While Section 9 of the Aadhaar Act states that it is not evidence of citizenship or domicile, the new tools are seeking to ensure only citizens get the unique number.Over the last 15 years, over 140 crore Aadhaars have been generated, including for those who have died, and there is near adult saturation. With infants also now getting Aadhaar soon after birth, govt has decided to tighten the norms for new adult registrations.To thwart attempts by illegal immigrants to get the unique ID based on forged or fake documents, for the last couple of years, the onus has been on states to verify credentials and that Aadhaar is only issued after rigorous checks through a state portal.In the past, there were concerns over illegal immigrants getting Aadhaar and then using it for other purposes, including other IDs. “It is going to be difficult for any illegal immigrant to now get Aadhaar,” argued an official, indicating a shift from the relaxed, if existent at all, rules of enrolment.Sources said that even if illegal immigrants use Aadhaar to clear the SIR of electoral rolls, there is little possibility of new ones being able to use that as the launchpad for acquiring documents, and most crucially, citizenship.A new tool developed by UIDAI is also going to put a second layer of check for updates as well as enrolments by tapping into documents available online, such as driving licenses, PAN, MNREGS details, and going forward, things like electricity bill. These documents are also in line with the prescriptions for centralized KYC, and ensure a homogenous identity.