Aadhaar is a 12 digit individual identification number issued by the Unique Identification Authority of India on behalf of the Government of India. The number serves as a proof of identity and address, anywhere in India.
Aadhaar system provides single source offline/online identity verification across the country for the residents. Once residents enroll, they can use their Aadhaar number to authenticate and establish their identity multiple times using electronic means or through offline verification, as the case may be.