Yes, you can fill AD Category Bank details in IEC. There is space to fill only one Bank account details in IEC application and the same will be shown in your IEC Registration Certificate. It is always advisable to put that banker details with whom you deal regularly and have good relations.AD (Authorised Dealer) Category Bankmeans the bank who deal with the conversion of currency notes, coins or travelers' cheques designated in foreign currency into Indian Rupees and vice versa. Their objective is to provide easier foreign exchange facilities for travelers and tourists, including NRIs.