Illegal immigration is the movement of people across national borders in a way that violates the immigration laws of the destination country. In politics, the term may imply a larger set of social issues and time constraints with disputed consequences in areas such as economy, social welfare, education, health care, slavery, prostitution, legal protections, voting rights, public services, and human rights. Illegal immigration may be prompted by the desire to escape civil war or repression in the country of origin. This book presents and reviews data on unauthorised aliens' access to federal benefits and immigration fraud investigations and issues.