Internal trafficking occurs when a person is recruited in one area of a country or city and moved from area to area or city to city within the same country for the purposes of exploitation. An example would be a runaway girl picked up in Philadelphia, USA who is then driven from truck stop to truck stop up and down America’s East coast to be sold for sex.
If a person is trafficked into one country from another country it is case of external trafficking. An example would be a homeless man in Warsaw, Poland who is offered a job in the UK and travels to the UK but then finds himself trapped in forced labour. He is unable to leave because he has no money, can’t speak English and his trafficker has taken his passport.