Joe Natuman, a former prime minister and leader of the Vanua'aku party, says he has seen caretaker ministers using government vehicles for their campaigning.
Vanuatu will hold a snap election on January the 22nd after parliament was dissolved following the jailing of half the government of Prime Minister Sato Kilman.
Mr Natuman says state resources shouldn't be used by remaining caretaker ministers to promote political parties and he will raise the matter with the Electoral Office.
"Caretaker ministers are only caretakers of a ministry or their office. They shouldn't be travelling around the country using or abusing government assets to promote their political parties or their political candidates -- this is what I will be talking with the Electoral Office on."
Mr Natuman says laws need to be passed to prevent this from happening again.