In many cases items will be returned to you after inspection. However, any item that has a pest or disease risk will be withheld. Depending on the quarantine risk, some items can be treated to make them safe (you will have to pay a fee) while other quarantine risk items may need to be destroyed or returned to your home country (again, you would have to pay for this).
All luggage is screened using a combination of detector dogs, x-ray machines and physical inspection of bags upon arrival in Australia. If you fail to declare any quarantine items or make a false declaration you could:
Australian Quarantine screens ALL international mail sent to Australia. Quarantine will remove high risk quarantine items from parcels. Therefore it is important to let your family and friends know what items cannot be sent to you in Australia. Anything they send by mail must be declared on the postal declaration label.
TIP: many of your favourite foods are available in Australia’s major cities. These foods have to pass strict quarantine conditions before they are allowed into Australia.