Deborah Stokes was appointed high commissioner in March 2013 and finished up last week.
It’s believed she still had about eight months to go on her Port Moresby posting.
“Today I farewell PNG taking with me many fond memories of this remarkable country. Lukim yu bihain,” she tweeted late last week.
The timing of her departure, so close to PNG's 40th anniversary of independence celebrations in September, has raised eyebrows in Port Moresby.
