The first international agreement to define human trafficking features among the Palermo protocols, three additional protocols to the UN Convention against Transnational Organized Crime (UNTOC). The Protocol to Prevent, Suppress and Punish Trafficking in Persons, Especially Women and Children was ratified by Switzerland on 27 October 2006.
According to the Protocol, the term 'trafficking in persons' means “the recruitment, transportation, transfer, harbouring or receipt of persons, by means of the threat or use of force or other forms of coercion, of abduction, of fraud, of deception, of the abuse of power or of a position of vulnerability or of the giving or receiving of payments or benefits to achieve the consent of a person having control over another person, for the purpose of exploitation.” Exploitation includes but is not restricted to “the exploitation of the prostitution of others or other forms of sexual exploitation, forced labour or services, slavery or practices similar to slavery, servitude or the removal of organs”.
As part of a diplomatic initiative, Switzerland has called for the UNTOC's definition of transnational organised crime to be clarified.