An elderly person in Masuda, Ajmer, Rajasthan attempts to use a biometric authentication machine

Some of the most vulnerable people have been denied meagre pensions because of errors in linking their details with Aadhaar numbers.

A ration cardholder explains how they are unable to get their rations as the biometric machine does not recognize their fingerprints in the winter when the skins of the fingers are dry and develop cracks