Effective service of a rectification notice is required before...

Effective service of a rectification notice is required before adjudicating a refund of accumulated input tax credit under an inverted duty structure. Adjudication after the notice was returned undelivered breached principles of natural justice because the claimant was denied an opportunity of hearing. The refund rejection was set aside and remitted for fresh adjudication after granting a hearing, while leaving the merits of the refund claim open.