vi. It is noted that under the scheme of the Insolvency and Bankruptcy Code, 2016, any objection with regard to the pre-existing dispute has to be raised by the Corporate Debtor at the first instance, at the time of giving a reply to the Demand Notice under Section 8. However, in this case, the Operational Creditor has served the Demand Notice vide email, which has not been bounced back. However, the Demand Notice, sent by speed post to two different addresses of the Corporate Debtor appears to have been ‘not served’ since the remarks of the postal authorities with respect to the first service is “Item Returned Addressee Left without instructions” and the postal report w.r.t. the second service is “Item Returned Unclaimed” . The Corporate Debtor has not chosen to give any reply to the Demand Notice under Section 8 and raised any pre-existing dispute. However, the Corporate Debtor in its reply, filed before this Adjudicating Authority to the Application filed by the Operational Creditor under Section 9 of the Insolvency and Bankruptcy Code, 2016, has raised the pre-existing disputes by producing various emails which have been discussed in the preceding paragraphs. Therefore, it cannot be said that the Corporate Debtor has lost the right to raise pre-existing disputes at a later stage.