---
title: "init(authenticationCertificateChain:)"
framework: IdentityDocumentServices
role: symbol
role_heading: Initializer
platforms: [iOS 26.0+, iPadOS 26.0+, macOS 26.0+]
path: "identitydocumentservices/iso18013mobiledocumentrequest/requestauthentication/init(authenticationcertificatechain:)"
---

# init(authenticationCertificateChain:)

Initializes a request authentication.

## Declaration

```swift
init(authenticationCertificateChain: [SecCertificate])
```

## Parameters

- `authenticationCertificateChain`: A certificate chain that you use to authenticate the requestor.