GoGet Members - Pay Dad's $49 Joining Fee. He Gets $100 Credit.

You have to be a GoGet member and they don't have to be your Dad.

Maybe combine with free membership https://www.ozbargain.com.au/node/155275

From site:

-Valid for the GoStarter plan only. Dad can upgrade later if he likes GoGet.
-Dad must put your name in the application, under “How did you hear about us?”
-You, the referrer, must have an active GoGet account.
-The $49 joining fee will be charged whether or not Dad signs up. No refunds.
-Applications using the Father’s Day promo code will be rejected unless they include a referring name which has registered using the Father’s Day form.
-Not valid with any other offer or referral bonuses.
-Dad must not be an existing GoGet member.
-“Dad” doesn’t have to be your father. Feel free to give it to any family member or friend, as long as you’re happy paying the joining fee for them.
-Driving credit is valid for 12 months.