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# merchantIdentifier

A value that represents the merchant that makes the request.

```
var merchantIdentifier: String? { get set }
```

## Discussion

This property identifies the merchant making the request, and must match one of the merchant identifiers in the app’s entitlement. For information about configuring the entitlement, see <doc://com.apple.documentation/documentation/BundleResources/Entitlements/com.apple.developer.in-app-identity-presentment.merchant-identifiers>.

Set this property before you invoke [`requestDocument(_:completion:)`](/documentation/PassKit/PKIdentityAuthorizationController/requestDocument(_:completion:)).

---

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