'Policing' of vax certificates by businesses...
probably problematic:
https://www.abc.net.au/news/science/2021-09-27/covid-19-vaccine-certificate-who-is-responsible-for-checking/100485844
And things like this are going to happen...
https://www.9news.com.au/national/coronavirus-gold-coast-updates-gold-coast-woman-charged-for-allegedly-pretending-to-be-a-doctor/097192b1-1bee-41fd-9399-9b2517d0e2aa
And this...
https://www.abc.net.au/news/science/2021-09-10/covid-19-vaccination-certificate-can-be-easily-forged/100441774
