You can file a petition for child custody in your county's Superior Court. If you are divorcing, the petition will be included in your divorce papers.Summons (Uniform Parentage-Petition for Custody and Support) (incl. Spanish). FL-220, Response to Petition to Establish Parental Relationship (Uniform Parentage). Married parents who wish to obtain custody or visitation orders must first open a family law case, usually for dissolution of marriage (divorce). File your Petition and Summons. Choose at least one box below to explain why you are using this form: a. Obtain and fill out required family law forms, both mandatory and casespecific. You may review the forms you might need in the section below. A restraining order can impact a child custody dispute both in the immediate and long term.