Under Illinois law, paternity is a term that refers to the biological relationship between a father and his child. This relationship also has legal implications. Paternity is used to determine matters such as child support, custody, visitation and inheritance.
In Illinois divorce cases, establishing paternity can be one of the most important steps for determining certain important issues. Paternity refers to the biological relationship between a father and a child. Under the law, the biological father of a child is also the legal father of the child, regardless of the marital status of the father. This means that fathers' rights and obligations, such as visitation and child support payments, are a part of paternity.
Determining a child's paternity may be necessary when matters of child support, child custody or adoption are involved, and DNA testing is used to examine DNA markers and look at the relationship between two people. When Illinois residents undergo DNA testing, samples from a mother, child and alleged father are taken. These tests have a 99 percent certainty rate or higher.