---
title: threadIdentifier
framework: usernotifications
role: symbol
role_heading: Instance Property
path: usernotifications/unmutablenotificationcontent/threadidentifier
---

# threadIdentifier

The identifier that groups related notifications.

## Declaration

```swift
var threadIdentifier: String { get set }
```

## Mentioned in

Generating a remote notification

## Discussion

Discussion You may specify any value for the string, but assign the same thread identifier string to all notifications that you want to group together visually.

## See Also

### Grouping notifications

- [categoryIdentifier](usernotifications/unmutablenotificationcontent/categoryidentifier.md)
- [summaryArgument](usernotifications/unmutablenotificationcontent/summaryargument.md)
- [summaryArgumentCount](usernotifications/unmutablenotificationcontent/summaryargumentcount.md)