Age verify in Australia

Ok Steam....i See you.

I have been using steam since i was 23 (EDITED: i messed up how old i was and the year i started using steam, thanks to a few commentors here) im now 46! I don't own a credit card, so how the hell am i meant to " Verify " that i am 46 years old? You don't give us an option to upload an Australian Drivers licence either, what the hell?