Siliguri fast track court judge Madhumita Basu also allowed the police to interrogate Saradha Group chairman Sudipta Sen and his deputy Debjani Mukherjee.
The judge rejected the bail petition of Mukherjee and ordered the jail authorities to check her health regularly as her counsel submitted that she was "not well".
The case had been filed against the company on May 22 by a depositor, Uma Pal Chowdhury.
A large number of agents and depositors, who had allegedly been duped by the company, thronged the court premises.