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# PKPassLibraryDidChange

A notification that PassKit posts when the pass library changes.

```
static let PKPassLibraryDidChange: PKPassLibraryNotificationName
```

## Discussion

PassKit posts this notification on an arbitary queue, and only does so if an instance of `PKPassLibrary` exists. The notification’s user info dictionary describes the changes. See [`PKPassLibrary`](/documentation/PassKit/PKPassLibrary) for the keys it uses.

---

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