# Manual notifications

Atom object usually fire notifications at the proper times. However, in some cases (Property member, manual handling of container change), it may be desirable to manually fire a notification.

This is possible but require some care.

First, when manually notifying, you are responsible for building the change dictionary that will be passed to the handlers. You may refer to Notifications and observers for a description of the content of this dictionary for normal notifications.

Second, because atom handle separately the static observers and the dynamic observers, you will to be sure to call both kinds. To notify the static observers, you should call the `notify()` method, while to notify dynamic obsevers you need to call the `freeze()` method on the instance.