The Illinois Petition (To Reduce-Increase-Terminate Child Support) is a legal document that is used to request a change in a court-ordered child support obligation. This petition can be used by either the paying parent or the receiving parent to request a change in the amount of the child support payment. Depending on the facts of the case, the petition may request a reduction, increase, or termination of the child support obligation. The types of Illinois Petition (To Reduce-Increase-Terminate Child Support) are: 1. Petition to Reduce Child Support: This document is used to request a court to reduce the current child support amount. 2. Petition to Increase Child Support: This document is used to request a court to increase the current child support amount. 3. Petition to Terminate Child Support: This document is used to request a court to terminate the current child support obligation.