The Australian government has denied any role in a Papua New Guinea court order for resettlement of refugees and asylum seekers held in detention on Manus Island, saying it is not a party to the case.

PNG's Supreme Court is expected to consider Australia's legal responsibility in resettlement of about 900 men being held in the controversial detention centre, but the Department of Immigration and Border Protection denied Chief Justice Sir Salamo Injia had summoned an Australian representative to the court on Thursday.

The court ordered a resettlement plan in a hearing on Tuesday, a move detainee advocates feared would further delay any release or compensation.

The latest case follows a decision in April that found the detention centre was unconstitutional, prompting the PNG government to begin moves to close it.