AFDC is designed to provide financial support to relatives for the care of dependent children. The most common types of AFDC fraud include underreported and unreported income or resources, misrepresentation of the family unit, and duplicate or multiple aid. Many States now use fraud prevention computer screens to identify these abuses. While investigative responsibilities and AFDC programs vary from State to State, the Office of the Inspector General (OIG) has overall responsibility to supervise, coordinate, and provide police direction for auditing and investigative activities. A number of OIG projects using computer matching formats have been effective in detecting AFDC and related fraud. A user's manual for the AFDC States Benefit Project, a service providing information to State and local agencies to aid in fraud detection, is appended.