The notices were served under the bilateral investment treaties between India and these countries.
The claims filed by the six banks are supported by other lenders, including the Overseas Private Investment Corporation of the US and five international banks.
The banks had sought negotiations with the Centre to work out an amicable and comprehensive settlement of all claims filed by the offshore lenders to the project, failing which the dispute would be referred for international arbitration, a statement from law firm Dua Associates said on behalf of the steering committee of the offshore lenders.
