To prepare for an SSAT review of a Centrelink decision you can:
You can familiarise yourself with what the Authorised Review Officer (ARO) has said about your case, and be prepared to point out to the SSAT which parts of the ARO's decision or reasoning you disagree with and why you disagree.
Centrelink will send you relevant documents from your PPL records which are relevant to the application for review. You should familiarise yourself with these documents. The SSAT member who hears your case will have read these documents.
You do not have to prepare any written documents if you do not want to. SSAT members are skilled at asking questions to obtain the information which is required to make a fresh decision. The SSAT does not expect people to make submissions or present a case to it. You can just tell the SSAT your side of the story in your own words.
If you prefer, you might like to prepare a brief written summary of your case, even if only for your own reference during the hearing. The summary could be a series of "dot points". It is a good way to make sure that you raise all the matters you want to raise. If you prepare it in a form that can be left with, or sent to, the SSAT member, it is a good way to ensure that all aspects of your case are considered.
If you have kept any records of your contact with Centrelink relevant to your review, such as notes or copies of letters and forms, you should bring them with you to the hearing.
Any relevant information given to the SSAT at (or before) the hearing will be placed on your Centrelink file. These papers will be returned to Centrelink after the hearing.
If you think that information is important to your case and that the SSAT should know about it, you should tell the member at the hearing - even if you have given this information to Centrelink in the past. It may or may not be in the hearing papers. If you have additional documentary information for the SSAT, it is a good idea to retain a copy of the information you provide for your records.