The Income-Tax department will start investigation into lakhs of frozen demat accounts to unearth black money and undisclosed transactions in them.
Department sources said that the money in these accounts could run into thousands of crores.
Certain preliminary checks have revealed undisclosed transactions and accounts that have not been disclosed, to hide black money, a tax department source said.
The accounts were frozen by the two depositories, National Securities Depository (NSDL) and Central Securities Depository Services (CDSL), on January 1, 2007.
This move came after lakhs of investors failed to comply with the government's directive to furnish details of their Permanent Account Number (PAN) while transacting in the financial markets.
"We have received a list of suspicious accounts and investigation (into those) will start," the source said.
Tax department sources said that with the help of the unique PAN numbers they have been able to track down shareholders who are not running their accounts. In certain cases the account-holder may have died, and some may have changed addresses and did not inform the department, a source said.
Even after the accounts were frozen, some investors are receiving money in the form of allotment of shares in IPOs and certain other ways, they said.
