Aadhaar Card is a 12-digit identification number issued by UIDAI to Indian residents. To register for an Aadhaar Card, one visits the nearest enrollment camp with identification documents, provides fingerprints, iris scans, and photos. Within 20-30 days, a registered applicant will receive their Aadhaar number. One can download their e-Aadhaar by visiting the UIDAI website and providing registration details. An Aadhaar status can also be checked online or through SMS. An Aadhaar Card is now sufficient documentation to obtain a PAN card based on its ability to prove identity, address, and date of birth.