The woman Ladoo, now a Pakistani citizen, took volunteer retirement in August 2007 and settled in Pakistan with husband later.
However, her pension continued and his father Rajju Khan withdrew it till 2011 through bank, police said.
The matter came to light in May this year following which the collector ordered a probe which found his father and brother guilty.
The FIR was lodged against Khan and his son recently with Mohangarh police station by border intelligence unit of police for fraudulently withdrawing pension.