UIDAI has clarified that the Aadhaar Letter, e-Aadhaar, PVC card and Aadhaar App are all equally valid as identity proof. It ...

Aadhaar is a valid official document widely accepted as proof of identity which has the users name, address, contact number and a 12-digit unique identity number.

When a computer gets old or you are handing it over, you must delete everything on it. As a matter of fact, it is important that you also securely wipe the computer so the files are not recoverable.