Trafficking in human beings for sexual exploitation is a criminal business of transnational nature, ranking third after narcotics and arms trafficking in generating huge amounts of illegal profit. THB in all its manifestations is a dangerous crime that results in significant psychological, emotional, financial and often physical harm to victims, representing a serious violation of human rights. Despite the seriousness of the crime, law enforcement and criminal justice authorities across the world encounter various problems in investigating and punishing perpetrators. One important barrier is corruption, which – as with other criminal enterprises – is a significant facilitating mechanism.