"We have asked for explanation from the Sahara Credit Cooperative Society in 12 cases. We have not yet received the response," a senior Agriculture Ministry official told PTI.
There were complaints that Sahara agents were forcing investors to transfer their money into the new credit cooperative schemes from older Sahara savings plans, another official said.
Multi State Cooperative Societies act is being implemented by the Union Agriculture Ministry. Sahara Credit Cooperative Society Ltd was set up in 2010.
Sahara group claims that it has directly refunded 95 per cent of the amount due to the investors.
Last week, markets regulator Sebi had disclosed having refunded over Rs 42 crore to the bondholders of the two Sahara firms while discrepancies were found in nearly 3,000 refund applications.