The Afghans were granted citizenship under Vanuatu's Development Support Program.
The family of five are now seeking assistance from Vanuatu's Embassy in Brussels to be repatriated.
The director of Vanuatu's Department of Foreign Affairs, Yvon Basil, has confirmed the Afghans' request.
But Mr Basil said, because Vanuatu has no connection with Afghanistan, the family's request had come through other foreign missions including New Zealand and Australia.