In his letter dated July 25, Khetan alleged that companies including the Adani and Essar groups have siphoned money through "over-invoicing" of imports under power and infrastructure heads.
No immediate comments were available from the companies on the allegations.
This has led to loss to the public exchequer and public sector banks, Khetan alleged. The AAP leader claimed that his complaints were based on Directorate of Revenue Intelligence (DRI) reports.
"The charges, if proved, may jeopardize the economy of the country," he wrote. Khetan said he had forwarded similar complaints to the CBI in the recent past.
"This communication however does not specify which of my complaints in particular has been referred or what exact direction has been given by the PMO," Khetan claimed.