The petitioner must file for custody with the appropriate district court. For information about how to file documents, see the Filing Procedures web page.If you're not finding the forms you need, contact us at (801) 238-7990 or Click here to contact the web navigator. Red Law Utah walks you through the steps to file for child custody in Utah. Contact us today for help with your child custody case! To file for custody, use the state court system's Online Court Assistance Program (OCAP) to fill out the petition and other required documents. Below you will find 678 unique forms. The average form is 3 pages long, with 94 fields per page. You can voluntarily dismiss your child custody petition without any penalty. You may file your custody petition in family court or another court that handles custody cases.