Archiving passes

From iPhone:

Once a pass has been voided or has expired, it will automatically move to the archive, even it’s possible to retrieve any archived pass to the Live section. Even in archive, passes are still active, so can be updated and can receive push notifications.

To show an expired pass, scroll to the bottom of the Wallet stack, tap View expired passes, select the pass, and tap Show.

For retrieving an archived pass, click on Edit at the top left, select the pass you want to retrieve and click on Unhide at the bottom right.

From Android PassWallet:

You can archive a pass manually by selecting it and clicking on the tray icon at the bottom (the second from left).

To bring it back to the Live section, click on the three lines icon at the bottom left and then in Archive. Select the pass you want to retrieve and click in the same tray icon.