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# invalidate()

Stops any outstanding operations and invalidates the manager.

```
func invalidate()
```

## Discussion

> Important:
> This method is available in iOS 12.5, and in iOS 13.5 and later.

Once you call this method, the object can no longer be used. To start using [`ENManager`](/documentation/ExposureNotification/ENManager) again, create and activate a new instance of the class.

## Topics

### Completion Handlers

[`var invalidationHandler: (() -> Void)?`](/documentation/ExposureNotification/ENManager/invalidationHandler)

The handler that the framework invokes when invalidation completes.


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