A special court also took cognisance of the charge-sheet on Wednesday. The court has asked Chidambaram and his son to be present in court on April 7 when charges will be framed.
Purvi, a Belgian national, is an accused in the case registered by the Enforcement Directorate, while Nirav Modi is the prime accused in a $2 billion bank fraud at state-owned PNB.
India had signed a deal in 2010 under the UPA regime to buy 12 AgustaWestland AW101 helicopters for the service of the Prime Minister, the President and other VVIPs.