Display a pass based on time or location.

Some passes include time or location info and may automatically appear where or when you’re likely to use it. The pass appears on the lock screen when you wake your iPhone. In Settings, tap Privacy, and tap Location Services. Confirm that Location Services and Passbook are on. Tap  on the pass and confirm Show On Lock Screen is on. Note: If your pass doesn’t appear automatically, go to Passbook and select the pass there to scan it.

by via Apple - Support - Most Recent - iPhone