A couple of Indian Aadhaar card holders have approached UIDAI offices for issuance of duplicate Aadhaar Card.
By the way, why is a duplicate Aadhaar card required. One reason could be that the original card has been lost, or due to wear and tear, the number is not clear.
AADHAAR Number by itself has no value. It has value only if it is attached to some other service viz Bank Account etc.
Assuming that the Aadhaar is being used for Authentication purpose, than also only the Aadhaar number is required not the Aadhaar card itself.
So, per-Se, duplicate Aadhaar cards are not required. That is why till date UIDAI has not formed any rules for issuance of Duplicate Aadhaar cards.
Simple activities to safeguard your Aadhaar Card: -
Immediately on receipt of the Aadhaar Card, laminate it. This will protect it against the normal wear and tear.
Scan the same, and store the Scan image on your PC and mail.
Take a xerox copy and carry the Xerox copy if required.
Save the Aadhaar number on your mobile.
As responsible Aadhaar card holders, let us not unnecessarily request UIDAI, for Duplicate Aadhaar cards.