Asserting that the Bharatiya Janata Party would not be able to scare the Opposition by the tactics of sending notices "casually to everybody", Banerjee said: "We will complain to the Election Commission against such trend."
"They (the Centre) are doing it deliberately ahead of the polls," the Trinamool Congress supremo told reporters at the state secretariat.
Vadra was Wednesday questioned by the ED in connection with a money-laundering probe into alleged possession of illegal foreign assets, days after his wife, Priyanka Gandhi, was formally inducted into the party.
Banerjee also said she would be in Delhi next Wednesday and Thursday, where the Opposition parties would make a decision on their future course of action.
