Pension / service records are personal information and cannot be shown to third party.
After 4 years , as per Supreme Court orders no pension can be stopped in most cases.
Generally , offices keep recieving such rti and know to ignore it.
I recommend that your father go to the office and politely ask them to keep photocopy of all documents to be on safe side.
Nal, but dealt with rti and pension for a good part of my career.