Appellate authorities to make enquiry on failure of AO to do so before deleting additions made by AO

IT : In case of unaccounted entries found in books of account of assessee, though it is obligation of Assessing Officer to conduct proper scrutiny of material, in event of Assessing Officer failing to discharge his functions properly, obligation to conduct proper inquiry shifts to Commissioner (Appeals) and Tribunal and they cannot simply delete addition made by Assessing Officer on ground of lack of inquiry