An Illinois Motion to Extend/Modify Plenary Order (also known as a petition to modify or extend an order) is a legal document filed with a court in the state of Illinois. This motion is used to modify or extend a previous court order awarded by a court. The petitioning party must demonstrate a substantial change in circumstances since the original order was issued in order to successfully modify or extend the order. There are two types of Illinois Motion to Extend/Modify Plenary Order: 1. Motion to Extend Plenary Order: This motion is used when the court order needs to be extended. The petitioning party must demonstrate that the original order should be extended for a specific period of time due to a substantial change in circumstances. 2. Motion to Modify Plenary Order: This motion is used when the court order needs to be modified. The petitioning party must demonstrate that the original order should be modified due to a substantial change in circumstances that render the original order no longer applicable.