The government has given sanction for prosecution against PNB executive director Sanjiv Sharan as part of the clean up exercise in the system.
The chargesheet, filed in a special court in Mumbai, also names several other top officials of the bank.
FinMin finally sacked executive directors K V Brahmaji Rao and Sanjiv Sharan on January 18. The bank's board, however, had felt they had no criminal intent and it was a case of 'casual oversight'
The 12,000-page charge sheet further claimed that a similar fraud was detected in 2016 following which the RBI took up the issue and issued circulars to all banks.