India, Jan. 24 -- The Unique Identification Authority of India (UIDAI) issues the Aadhaar card as the official identity proof for every Indian citizen. This is a 12-digit number that is mandatory for every other document, like for banking, government programs, and mobile service activation. This is because it connects to your biometric and demographic information and works as a prime key. Here is the complete guide provided for anyone who wants to apply:

Aadhaar applications are open to all Indian residents, including newborns and children. Baal Aadhaar permits enrollment for children under five because there is no age restriction for this program. Foreign residents with valid documents may also apply for a temporary Aadhaar.

Children u...