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# applicationData

Application-specific data or state.

```
var applicationData: Data? { get set }
```

## Discussion

Use this property for additional data as may be appropriate for your app—for example, a shopping cart identifier or an order number.

A hash of this data is included in the signed payment data (the [`paymentData`](/documentation/PassKit/PKPaymentToken/paymentData) property of [`PKPaymentToken`](/documentation/PassKit/PKPaymentToken)). You are responsible for sending the full application data to your server, if needed.

---

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