Vermont OCS Parentage Complaint: Non-Cooperative Parents is a legal proceeding initiated by the Vermont Office of Child Support (OCS) to establish the legal parentage of a child when the child's parents have not cooperated in the process. This complaint can be filed by either the OCS or the child's biological parents. There are three different types of Vermont OCS Parentage Complaint: Non-Cooperative Parents: a Voluntary Acknowledgement of Parentage, an Administrative Hearing, and a Legal Complaint for parentage. A Voluntary Acknowledgement of Parentage is a signed agreement between the child's biological parents stating that they are the child's legal parents. An Administrative Hearing is a hearing held before an Administrative Law Judge to determine the legal parentage of the child. A Legal Complaint for parentage is a lawsuit filed in court by either the OCS or the child's biological parents to establish legal parentage.