A Vanuatu diplomatic passport holder, Pascal Anh Quan Saken, says Papua New Guinea's opposition spread unfounded rumours about his visit to Port Moresby last week.
Mr Saken, who says he owns the super yacht Phocea which has been detained in Vanuatu since July due to false documentation, became the subject of a police and customs investigation while in Port Moresby.
PNG officials briefly detained his passport after the private plane he flew in on arrived without proper flight clearance.
Mr Saken says despite rumours that his plane was carrying contraband and that he was involved in secret meetings, he was only in PNG to try and obtain a US visa from the US embassy.
"Those rumours about me are totally ridiculous and very unfair. I'm working very hard to help Vanuatu. I'm using all my networking that I have in Europe and USA in order to help the infrastructure of my country."
Anh Quan Saken