In response to large numbers of complaints from consumers, the Energy Industry Ombudsman of South Australia and the Essential Services Commission of South Australia have pressured AGL to change its security deposit policy and to return all security deposits collected from its customers in South Australia. AGL has also agreed not to collect security deposits in future.
In this day and age the collection of security deposits seems an archaic policy that is not, as far as I am aware, practised in any other industry.