You would only have to petition the court if there is an order denying you a passport that has been certified by the Secretary of HHS after Illinois notifies them. Have you tried to get a passport and been told you are denied on the basis of child support arrearage over $2,500? If so, you must petition the court. Find an experienced family law attorney to help you with this if you have to file a petition.
Persons who owe child support debts greater than $2,500 will be sent a passport denial
after which you'd have to Petition the court for an order. Hire counsel for this dispute.