At what airport will Australian advance passenger processing (APP) be performed?

Assume a passenger flies Zurich-Dubai-Sydney-Nouméa on a single e-ticket, and checks in on the Qantas website.

Then assume the following two scenarios:

The passenger prints the boarding passes at home and goes directly to the gate, or
The passenger collects the boarding passes at Zurich airport.

In each scenario, will Australian APP processing take place in Zurich or Dubai, and at what exact stage of the check-in/boarding process?

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What is Advance Passenger Processing?

Advance Passenger Processing (APP) is a two-way interface between an airline's Departure Control System and our immigration databases. It confirms before boarding to the carrier that a traveller has: authority to travel to Australia or to depart Australia and. has a visa or appropriate travel documents.

Which countries require advanced passenger information?

You'll need to provide your Advance Passenger Information for the following destinations:

All Caribbean destinations.
China.
India.
Japan.
South Africa.
United Arab Emirates.
United Kingdom.
USA.

How can I get advance passenger information?

This is known as Advance Passenger Information (API). Your airline will let you know what they need from you. Usually, they will ask you to provide these details when you book your flight or check in. Contact your airline if you have any questions about API requirements.

Is Advance Passenger Information mandatory?

Without complicating things, Advance Passenger Information or (API) is simply a process whereby you the passenger are required to provide certain information to the airline or travel company to which you are travelling with before you travel.

How to complete DPD (Digital Passenger Declaration) Australia

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Andrea Piacquadio, Oleksandr Pidvalnyi, Andrea Piacquadio, Andrea Piacquadio