As more people are now working from home, there is a need to execute documents such as deeds, contracts etc. using electronic signatures. Article lists the five essential elements necessary for formation of legally binding contracts and the  Electronic Transactions Acts that exist for Australian states.

https://www.mondaq.com/australia/Coronavirus-Covid-19/913280/Covid-19-Australia-When-Can-Electronic-Signatures-Be-Used-For-Corporate-Contracts