Aadhaar is a 12-digit unique identification number, and it is issued to Indian citizens based on their biometric and demographic-specific data. Interestingly, this system aims to eliminate duplicate and fake identities.
According to the Unique Identity Authority of India (UIDAI) website, Aadhaar cards, which are 12-digit identity numbers unique to each enrolled resident in India, can be changed online for free until June 14.