Counter staff will provide information local to your depot of pickup. The most popular option is to contact the toll provider after travelling the toll road - within 72 hours (Melbourne, Brisbane) or 48hours (Sydney).

Here is the link for toll information:

Brisbane: https://www.govia.com.au/via/home or http://www.flowtoll.com.au/page/Home

Sydney: Sydney motorways http://www.sydneymotorways.com/

Melbourne: CityLink Melbourne http://www.citylink.com.au/