An Illinois Mother’s Petition to Determine Parentage/Custody/Visitation/Set Child Support is a legal document that is used when a mother in the state of Illinois is seeking to establish the paternity of her child, as well as seeking custody, visitation, and child support. This document is typically filed when the father of the child is not listed on the birth certificate, or when the parents are unmarried. The petition can be used to establish paternity, to establish paternity and set child support, or to establish paternity, set child support, and determine custody and visitation. It is important to note that this document must be filed with a local court in the state of Illinois, and must include a sworn statement from the mother confirming the paternity of the child.