The Illinois Declaration of Paternity With Entry Of Appearance is a legal document used to establish the paternity of a child whose parents are not married. This document must be completed by both parents and signed in the presence of two witnesses. The document must then be filed with the Illinois Department of Healthcare and Family Services. There are two types of Illinois Declaration of Paternity With Entry Of Appearance: Voluntary Acknowledgement of Paternity and Established Paternity by Court Order. The Voluntary Acknowledgement of Paternity is signed by the mother and father at the time of the child's birth, while the Established Paternity by Court Order is signed by the father after a court order has been issued determining the legal paternity of the child. Both forms must be completed and signed in the presence of two witnesses and filed with the Illinois Department of Healthcare and Family Services in order to be legally binding.