@angel1719 and @bestofluck Many thanks for the reply, and please add me into the list.
I did ask in the Bank if i cud write the File number, name.. but they say not write anything at the back of DD. I posted the same question to the OINP, however no luck

.. I'm planning to send across the DD by 25th Aug.. probably as @angel1719 suggested, i might want to send the DD along with the PDF copy OINP sent and a copy of the old DD too.