You can see here the list of  recommended sites:

World Customs Organization (www.wcoomd.org)

World Trade Organization (www.wto.org)

Interpol (www.interpol.int)

World Health Organization (www.who.int)

EUROPOOL (www.europol.europa.eu)

World intelectual property organization (www.wipo.in)

FIATA (www.fiata.com)

FATF (www.fatf-gafi.org)

International chamber of commerce (www.iccwbo.org)

Universal Postal Union (http://www.upu.int)

Unated Nations office on Drugs and Crime (www.unodc.org)

United Nations (www.un.org)