"Incomplete and wrong addresses written on the envelopes, change in addresses and residences remaining locked for days together are some of the reasons why the Postal Department is finding it tough to deliver the Aadhaar cards," K Sandhya Rani, Postmaster General (Business Development and Marketing & Technology) told PTI.
The quantum of Aadhaar card letters received for the delivery is huge, which is a challenge in itself, besides wrong pin codes, she said.
While over 4.69 crore Aadhaar cards in the state have already been delivered, the department has returned over 2.78 lakh to the office of Central Identities Data Repository (CIDR)/Unique Identification Authority of India (UIDAI) at Bangalore, she said.
"Though the Chief Postmaster General and the Regional Postmaster Generals are monitoring the process of speedy delivery of Aadhaar cards, we have returned 2,78,826 letters containing Aadhaar cards due to several reasons," she said.