Hi there! I understand you're having trouble accessing the Australian ETA app because it's asking for a passcode you don't remember setting. Let's work through this together.

First, just to clarify, did you or anyone else possibly set up a passcode when you first opened the app or during the application process? Sometimes the app prompts users to create one to secure their information. If you don't recall ever doing this, no worries—we can try a few things.

Here’s what I suggest:

1. Check for a "Forgot Passcode" option:
Unfortunately, the Australian ETA app currently does not display a direct "forgot passcode" button, which limits resetting it via the app itself.

2. Close and reinstall the app:
If you uninstall and then reinstall the app, this might clear any stored passcode settings. However, beware this might remove visa information saved locally on your device, so only do this if you have your visa details backed up or easily accessible.

3. Access via ImmiAccount:
The Australian ETA can also be accessed through the ImmiAccount portal online. If you have an ImmiAccount, you can log in there to view your visa details without needing the app passcode. If you don’t have one, it might be worth creating an account and linking your application.

4. Contact ETA support directly:
Because the app doesn't offer passcode resets, your best official resort would be contacting the Australian ETA support team at [email protected]. Explain your situation, and they can assist in logging you in or resetting your access.

5. Alternative: Use your passport at entry:
Remember, your approved ETA is linked to your passport. Even if the app is inaccessible, you can enter Australia by showing your passport with the ETA status electronically linked, provided you obtained the visa successfully.

Do you want me to guide you through uninstalling and reinstalling the app, or would you prefer to try logging into ImmiAccount? Also, let me know if you have any other information about when this passcode prompt began or if any updates were recently made to your app or device. That can help pinpoint further solutions.

Looking forward to helping you get this sorted!