The couple has been summoned by the Enforcement Directorate (ED) over Foreign Exchange Management Act (FEMA) violations.
The couple, Tinu and Arvind Joshi, who were held important positions in the Centre since the late 80s, were accused of purchasing benami property worth of whopping Rs 360 crore.
Following a raid in their residence, in which three crore inappropriate cash was found, the couple was suspended in Feb 2010.
An FIR has also been registered against them by the Lokyukta of Madhya Pradesh.
Tinu served as Deputy Secretary in the PMO from 1988 to 1990 while Arvind was Joint Secretary in the Defence Ministry during the 1999 Kargil hostilities.
Sources reported that the duo made investments in a number of areas ranging from agriculture to real estate and stock market.
It has also been reported that Arvind Joshi had allegedly indulged in speculative trading in shares, futures and options to the tune of Rs 270 crore in the last three years.
(With inputs from PTI)