---
title: threadIdentifier
framework: accessorynotifications
role: symbol
role_heading: Instance Property
path: accessorynotifications/accessorynotification/threadidentifier
---

# threadIdentifier

An identifier that groups notifications that belong to the same thread.

## Declaration

```swift
let threadIdentifier: String?
```

## See Also

### Identifying and grouping notifications

- [identifier](accessorynotifications/accessorynotification/identifier-swift.property.md)
- [AccessoryNotification.Identifier](accessorynotifications/accessorynotification/identifier-swift.struct.md)
- [sourceName](accessorynotifications/accessorynotification/sourcename.md)