When you check-in to fly to Australia, airline staff will electronically confirm that you have a valid visa to travel to Australia before you board the plane.
Airlines that fly to Australia must provide details of all passengers to Australia’s immigration and customs authorities ahead of their arrival in Australia, using the
Advanced Passenger Processing (APP) system.
APP enables airlines to confirm with Australian authorities that a passenger or crew member has the authority for travel to Australia. These checks are undertaken prior to boarding and typically only take seconds to complete.
For more information see Electronic visa record.