Make sure you fill in an Incoming Passenger Card on your flight to Australia. This card is available in several languages (see examples). If you bring any food, plant or animal products or more than A$10,000 or equivalent in foreign currency you will need to declare these on the form. Failure to declare may result in a large fine!
Hand in your Incoming Passenger Card as you clear Customs. If you are unsure about any items to be declared, ask a Customs official.