Mark Barron. My cousin was in IDC. Said it was the most humiliating experience of his life, and he's in his 70's. Arrested after a "trustworthy" agent got nailed. Because he had a dodgy extension, immigration police went back to his previous legal extension and charged him on about six months overstay. He's out for five years
Claire Blainey. The certificate of recovery excuses you from having two doses of vaccine, it does not exempt you from having a test, either before departure or on arrival. There is nothing in the MFA website Q&A which covers this