Illinois Consent To adoption of Unborn Child is a legal form that allows a birth mother and father to give their consent to an adoption plan for their unborn child. The form is used to document the parents’ consent to the adoption of their unborn child and is part of the adoption process. The form must be signed by both the birth parents and witnessed by two disinterested parties. There are two types of Illinois Consent To adoption of Unborn Child forms. The first is a Voluntary Consent form, which is used when the birth parents have agreed to the adoption and are willing to sign it. The second is an Involuntary Consent form, which is used when the birth parents are not willing to consent to the adoption, or if the birth father is unknown or cannot be located. Both forms must be notarized and filed with the court in order for the adoption to be finalized.