This report identifies and assesses methods used to detect and prevent fraud and abuse among staff and participants of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC). The report summarizes the relevant WIC regulations; describes basic controls or practices widely used by State and local agencies to detect and prevent fraud and abuse; and highlights enhanced controls that can further improve the program's integrity.In addition to this report, see Methods to Prevent Fraud and Abuse Among Staff and Participants in the WIC Program: Volume II, Site Visits.