Mr A. Deposited Rs. 3 lakh in post office (20 FD's of 15 thousand each) for 6 month . The same is stated in his income tax returns (He added 10000 interest income while filing returns for these FD's ).But he did not maintain proof of this trasaction (as all transactions were done in cash). So is there any sort of penal actions/penality there if he fails to prove he deposited such amount in Post office.

