Robert Vadra, the son-in-law of Congress president Sonia Gandhi, was on Monday asked by the Lok Sabha secretariat to explain his Facebook comments against ruling BJP MPs.
The Lok Sabha secretariat gave Vadra seven days to reply after two BJP MPs moved a privilege motion alleging that he "demeaned Parliament" with his comment.
"Parliament begins and so do their petty diversionary political tactics... People of India are not fooled. Regret to see India led by such so-called leaders !!," Vadra had commented before the monsoon session began on July 21.
Depending on his reply, the Speaker will take a call on whether the issue to the privileges committee or to dismiss it outright without any further scrutiny.
Parliament's privilege committee is heavily tilted against the Congress. The panel led by BJP's SS Ahluwalia has just one member from the party.
Among other people who had faced previlege notices previously were actor Om Puri, retired bureaucrat Ronen Sen and cartoonist Aseem Trivedi.
The notice was moved Thursday by BJP chief whip in the Lok Sabha, Arjun Ram Meghwal, and Dharwad MP Prahlad Joshi in an apparent bid to counter the opposition's corruption charges against their three top party leaders.
The BJP MPs raised the issue after opposition members disrupted Parliament demanding the resignation of external affairs minister Sushma Swaraj, Rajasthan chief minister Vasundhara Raje and Madhya Pradesh chief minister Shivraj Singh Chouhan over various controversies.