The Illinois Uniform Order For Support (OF) is a court document that outlines the legal child support obligations of both parents. This document is used to ensure that each parent pays their fair share of the costs related to raising their child, such as medical bills, daycare expenses, and educational costs. The OF includes detailed information about the financial responsibilities of each parent, including payment amounts, payment frequency, and enforcement measures. The OF is issued by the court and enforced by the Department of Healthcare and Family Services in Illinois. There are three types of Illinois Uniform Order For Support: income-share, percentage-share, and hybrid. The income-share model is based on the income of both parents and is used to determine the payment amount for each parent. The percentage-share model is based on the respective incomes of each parent and is used to determine the percentage of the total support obligation that each parent is responsible for. The hybrid model combines both the income-share and percentage-share models to determine the payment amount for each parent.