Migrant sex work
Because of their illegal and vulnerable economic status, some migrant sex workers may find themselves in situations where coercion and forced sex work may be present. Under international legal definitions of human trafficking, forced and coercive forms of sex work are considered to be instances of involuntary sex trafficking. However, many scholars caution against categorizing sex workers as either completely voluntary or completely involuntary. They often argue that sex work, like other forms of labor, can span a spectrum between the two extremes, with most circumstances falling in the middle through various labor rights violations. Nevertheless, the vulnerability of migrant sex workers can make them susceptible to exploitative or coercive labor practices that can resemble or be human trafficking.
Human trafficking
Trafficking for sexual exploitation was formerly thought of as the organized movement of people, usually women, between countries and within countries for sex work with the use of physical coercion, deception and bondage through forced debt. However, the Trafficking Victims Protection Act of 2000 (US), does not require movement for the offence. The issue becomes contentious when the element of coercion is removed from the definition to incorporate facilitation of consensual involvement in prostitution. For example, in the United Kingdom, the Sexual Offences Act 2003 incorporated trafficking for sexual exploitation but did not require those committing the offence to use coercion, deception or force, so that it also includes any person who enters the UK to carry out sex work with consent as having been "trafficked." In addition, any minor involved in a commercial sex act in the US while under the age of 18 qualifies as a trafficking victim, even if no force, fraud or coercion is involved, under the definition of "Severe Forms of Trafficking in Persons" in the US Trafficking Victims Protection Act of 2000.