Originally Posted by MoreMilesPlease

You said you did a "group trip" to India. This gives the impression that you were part of an organized group where there were people over 18 or 21 in charge of the group. If you signed up as part of a travel group there was probably some paperwork somewhere giving the organizers some authority over the minors in the group. This probably meant no need for any other official paperwork from each individuals.