Update 6/9/17
I just came back from Melbourne this week and noted that the exit procedures are basically done by a machine that scans your passport. Once you depart these machines you walk past a small free standing box that has a slot where you are supposed to deposit your exit card. So there is actually no control over you filling in the card correctly (or at all) and you could probably walk right past it without even depositing anything at all in the box.
This gives me little faith that the information on the exit card is actually used for anything important.
Original Answer
When departing from (for example) Tullamarine in Melbourne you pass through a set of doors1 that separates you from the terminal concourse and the departing immigration line. Just inside these doors, along the wall (and before you line up for immigration) is a bench that has spares of all the required forms you need2 for departing the country.
You’ll also encounter quite a few other people filling out these forms at the last minute!
I expect that this is the same when departing from other Australian airports.
1. You only need a passport and boarding pass to get through this door.
2. There should be pens there as well, but I’d bring my own
Credit:stackoverflow.com‘
4 Mar, 2024
4 Mar, 2024