Mumbai and Bengaluru, Nov. 10 -- Tata Power Co. Ltd has accused a Singapore arbitrator of conflict of interest and its own former officials of leaking company data, in a case that reads like a corporate spy story. A Singapore court had last week ordered seizure of shares of Tata Power's Singapore arms to recover $490 million of dues, concluding an years-long arbitration between Tata Power and its estranged private equity partner.

In a first information report (FIR) filed in Mumbai on 2 November, Tata Power alleged that one of the arbitrators who ruled against it had travelled to Russia with the rival's director and co-founder before the case started. To be sure, Tata Power did not mention this while it challenged the arbitration decision...