It is stated by the Communications Minister Ravi Shankar Prasad in Parliament that there is an amount of Rs. 1,000.61 crore lying unclaimed in the Post Office Saving Accounts, including in National Savings Certificate, Fixed Deposit etc.  The main reason is the non-withdrawal of matured investments by the account holders, minister stated.

Because it is a government Department, the unclaimed amount are there. If it was private banks, the amount would have been appropriated towards service charges, condition on minimum balance etc.