Originally Posted by
enthusiastic flier
Not sure how outdated this info is, but please don't count on it. An acquaintance who had just naturalised as a British citizen flew to their home country (India) soon after the event on their Indian passport - and almost got denied entry. Apparently Indian authorities allow a grace period of three months to use the Indian passport and luckily for the acquaintance they were within that timeframe.
Slightly OT, although India doesn't allow dual nationality, it does allow
OCI, which is basically Indian citizenship without the passport.
How could your acquaintance have been denied entry as an OCI individual?