Travelling to Vanuatu, you need valid passport.
We wish to recommend you to check in advance, before you leave, at Vanuatu Embassy abroad, whether the conditions for the entry and stay in the country did not changed in the meantime.
The cititzens of European Union do not need entry visa, travelling to Vanuatu. They obtain it in a moment of their arrival, provided stay period does not exceed four months. In case of stay longer than four months, you need to apply for entry visa at some Consular Section of Vanuatu Embassy (in Australia).
Information and warnings on travelling abroad is to be found HERE.