What Aadhaar Is
Aadhaar is a 12-digit unique identity number issued by the Unique Identification Authority of India (UIDAI) to residents of India, based on their biometric and demographic data. It’s designed to serve as a single, verifiable proof of identity that can be used across a wide range of government and private services.
Common Uses of Aadhaar
Aadhaar is commonly used (often alongside or as a basis for other IDs) for opening bank accounts, applying for a PAN or Instant e-PAN, enrolling in government welfare schemes and subsidies, mobile SIM card verification, and increasingly as an eKYC (electronic Know Your Customer) mechanism for various financial and government services, since it allows near-instant identity verification through OTP or biometric authentication.
Updating Your Aadhaar Details
UIDAI allows updates to demographic details (like address, name, date of birth, or mobile number) and biometric details through its official channels, including online self-service options for certain updates and physical Aadhaar Seva Kendras for others (particularly biometric updates or more significant demographic changes). Keeping your mobile number linked and updated is particularly important, since many Aadhaar-based services rely on OTP verification to that number.
Aadhaar and Privacy
Because Aadhaar is tied to sensitive biometric and demographic data, UIDAI provides features like masked Aadhaar (showing only the last 4 digits when sharing a printed copy) and Virtual ID (a temporary, revocable number that can be used instead of your actual Aadhaar number for certain verifications) to help limit unnecessary exposure of your full Aadhaar number.
Common Online Services
UIDAI’s official portal and mAadhaar app offer services including downloading your e-Aadhaar, checking or updating your details, locking/unlocking biometric authentication for added security, and verifying an Aadhaar number’s validity — reducing the need to visit an Aadhaar centre in person for many routine needs.