However, there are several countries where Indian travellers ... for road travel, an entry permit must be obtained from the immigration office. Travellers must carry a voter ID card or Aadhaar ...

You might want to be sure all of your travel ... ID, including IDs issued to dependents. Border crossing card. An acceptable photo ID issued by a federally recognized Tribal Nation/Indian ...

But the Indian government is in the final stages of enrolling all of its citizens in the world's largest ID system. Siva Parameswaran of the BBC's Tamil Service finds out how they did it.