I am applying Tourist Visa for Australia subclass 600, and on their attachment section they require me to attach "Evidence of Tourism in Australia". I am an Indonesian passport holder.
I'm planning to visit my sister (Who has Australian Permanent Residence visa) for a month for just family gathering and maybe helping her with daily activities since she's due to have a baby. I will be staying at her house, so I won't be booking any hotels/accommodation. What would be a good document to attach as Evidence of Tourism? I don't have flight tickets booked yet since it was recommended to book flights after securing the visa.