Re-assigning a work item

Hi,

I am soliciting solution or some ideas for the scenario below:

A user is assigned to an Approval Object (Notification Task). The user gets a work item in his SAP Inbox. But before completing that work item, the approval task was re-assigned to a new user. The new user gets a work item in his SAP Inbox. Question is, how do I delete the work item from the other user's Inbox.

I was wondering if there's a workflow functionality for this.

Your ideas are very much appreciated.

Thanks.

Giscard