---
title: customIdentifier
framework: intents
role: symbol
role_heading: Instance Property
path: intents/inperson/customidentifier
---

# customIdentifier

The unique identifier that your app uses to identify the person.

## Declaration

```swift
var customIdentifier: String? { get }
```

## Mentioned in

Improving interactions between Siri and your messaging app Resolving the Parameters of an Intent

## Discussion

Discussion Use this property to access the custom identification string that you specified at initialization time. The value of this property is also returned by the vocabularyIdentifier property. important: The information in this property is for developer purposes only. Use personHandle when your app needs to display identification information to the user.

## See Also

### Accessing app-specific identifiers

- [contactIdentifier](intents/inperson/contactidentifier.md)