Controversial Liberal senator Cory Bernardi, who has called the United Nations an "unelected and unaccountable body", will represent Australia during a three-month secondment with the global organisation.

Senator Bernardi will be joined in the bipartisan annual delegation by Tasmanian Labor senator Lisa Singh. The trip usually commences in early September.

While in New York, the parliamentary delegates will work with the established Australian Mission to the United Nations, and attend meetings, speaking engagements and other official functions.

He also remarked that Labor's policy "would have seen billions of dollars of Australian taxpayer funds disappear into that fiscal black hole of bureaucracy known as the United Nations."

And as recently as 2014 he again reflected on Labor's climate policy giving power to "unelected officials in the United Nations".

It is understood Senator Bernardi was selected for the secondment by his Senate colleagues. Asked about the selection process, a representative from Chief Government Whip David Bushby's office said: "Sorry, we don't provide that information."

Senator Bernardi said he was delighted to have been chosen for the delegation by his colleagues.

"This is a fantastic opportunity to assist in Australia's representations to the United Nations and to learn more about the purpose, inner workings and effectiveness of the UN," he said.

"Experiences such as this broaden the knowledge of any parliamentarian fortunate enough to participate."

With his appalling record against the UN, Bernardi should have refused the appointment. Accepting to become the Australian "envoy" to the United nations shows he is a two-faced hypocrite (4 times the hypocrite).

It is yet another embarrassment from the Libs (CONsevatives).