Papua New Guinea's caretaker prime minister, Peter O'Neill, has directed foreign affairs and immigration officials to revoke the citizenship granted to an Indonesian fugitive, Joko Soegiarto Tjandra.
Tjandra became a PNG citizen last week, with the foreign minister Ano Pala saying he met all the mandatory requirements as stipulated in the constitution.
But Mr O'Neill says there must be proper due diligence checks on everybody seeking citizenship.
Mr Pala says contrary to media reports, Tjandra was not a fugitive as he had been living in Singapore for many years.
He has told the newspaper, The National, that Tjandra had lived in Papua New Guinea for 10 years but travelled in and out of the country because of his business interests elsewhere.