In the Agriculture Improvement Act of 2018, Congress directed the U.S. Department of Agriculture’s Food and Nutrition Service to assess the implementation, impacts, costs, and benefits of child support cooperation requirements in the Supplemental Nutrition Assistance Program. FNS has contracted with Mathematica and MEF Associates to conduct this study. The study included 9 States. The team conducted a mixed-method study that included visiting sites and collecting administrative data. The site visits included interviews with state staff from the SNAP and child support agencies. The team also collected and analyzed administrative data from SNAP, child support, and, in some states, Medicaid and TANF. Finally, the team collected and analyzed cost data associated with implementing the requirement in selected states.