You can configure your human task to use notifications. Notifications enable you to alert interested users to changes in the state of a task during the task lifecycle. For example, a notification is sent to an assignee when a task has been approved or withdrawn.

You can specify for notifications to be sent to different types of participants for different actions. For example, you can specify the following:

• For the owner of a task to receive a notification message when a task is in error (for example, sent to a nonexistent user).

• For a task assignee to receive a notification message when a task has been escalated.

You can specify the contents of the notification message and the notification channel to use for sending the message.

• Email

  You can configure email notification messages to be actionable, meaning that a task assignee can act upon a task from within the email.

• Instant messaging (IM)

• Short message service (SMS)

For example, you may send the message shown below by email when a task assignee requests additional information before they can act upon a task:

For me to approve this task, more information is required to justify the need
 for this business trip

During runtime, you can mark a message sender's address as spam and also display a list of bad or invalid addresses. These addresses are automatically added to the bad address list.

For more information about notifications, see the following:

• Using the Notification Service

• Specifying Participant Notification Preferences

• Part XI, "Using Oracle User Messaging Service"