Pennsylvania Petition to INTERVENE IN CUSTODY is a legal document used in the state of Pennsylvania in order to seek court-ordered legal custody of a minor child. This petition is filed by a third party who is not a parent or legal guardian, but who has a legitimate interest in the welfare of the child. The petition is then brought before a court for review and determination. There are two types of Pennsylvania Petition to INTERVENE IN CUSTODY: Petition to Intervene in Custody and Petition to Intervene in Visitation. The Petition to Intervene in Custody allows a third party to intervene in a custody dispute between the child’s parents or legal guardians and seek custody of the child. The Petition to Intervene in Visitation allows a third party to intervene in a visitation dispute between the child’s parents or legal guardians and seek visitation rights with the child.