Originally Posted by
wwtknoyb
Will I have any issues with customs/immigration if I only show them the second/separate NGB-ICN etc. Ticket ?
That would be "hidden city" or "skiplagging". Should work for the sake of the 144-hour TWOV, but the consensus is that (depending on route and layover times) it is easier to do with no checked luggage. Also, you shouldn't do it too often with the same airline.