# JPKIPassContents.Certificate The certificate data associated with an identity document. ``` struct Certificate where IdentityType : JPKIPassContents.Identity ``` ## Overview Use this structure to access the underlying certificate data you use to sign the pass. ## Topics ### Defining data [`let data: Data`](/documentation/PassKit/JPKIPassContents/Certificate/data) The result of the signed data from the requested digital identity in X.509 DER format. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)