---
title: sharingInstanceIdentifier
framework: passkit
role: symbol
role_heading: Instance Property
path: passkit/pkidentitydocumentmetadata/sharinginstanceidentifier
---

# sharingInstanceIdentifier

A unique identifier that refers to an instance of sharing credentials to a person’s device that another user, device, or the web initiates.

## Declaration

```swift
var sharingInstanceIdentifier: String { get }
```