Hi @brosia! Had the same situation last 2015. My brother was a minor when we travelled to Australia, only the two of us. Aside from the normal requirements (statutory declaration for invites, etc), we submitted a permit to travel requested from DSWD. Nakalagay sa permit na I will be the guardian for the duration of the travel. We also submitted proof that he's currently enrolled sa uni (I think enrollment form ginamit namin) here in the Philippines. For financial support proof naman for him, we submitted docs of our parents. Hope this helps! đŸ™‚