If you use Passbook frequently on your iPhone, you may have noticed that certain passes can use your location and appear on your Lock screen while you're within the immediate area. This is so you can quickly and easily swipe up on your Lock screen to use your pass. The downside of this feature: no passcode is required by default, which could give someone access to your passes without your consent. If you're worried about privacy, but don't want to disable this feature entirely, never fear: You can turn it off on a card-by-card basis.
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