What to do if Income Tax Refund cheque issued by CPC Bangalore Returned undelivered?

Now days Assessee who file their Income tax Return online gets their refund cheque
issued by CPC Bangalore. Refunds are issued by two modes:-
1. By crediting the refund amount in Assessee’s bank account if the Assessee has
correctly mentioned his bank details inIncome tax Return Filed by him.
2. By sending Income Tax Refund Cheque if Assessee failed to submit or correctly
mention his bank account details in Income tax Return filed by him.
In case of Physical cheques there may be chances that after filing of Income
tax Return Assessee has moved to new address and his Income tax Refund cheque
issued by CPC Bangalore returned back for non-delivery.
There may also be a chance that although address is not changed but Assessee could
not receive the refund order as no one was there on the day when cheque was delivered
or Refund cheque returned undelivered by the postal department as the house
was locked.
In such cases one question arises what Assessee should do to request reissue of
Refund cheque or how to request Credit of that account in his bank account and
how to intimate the change in address?
Please note that, in case refund-processing has failed due to one of the reasons
Assessee needs to download the address/bank-details modification form (Response
Sheet) from the website of Income Tax department, fill the same and after that he needs
to send the same by ORDINARY or SPEED POST alongwith cancelled cheque and
other supporting documents to :
“Income Tax Department – CPC, Post Bag No – 1, Electronic City Post Office,
Bangalore – 560100, Karnataka”