undocumented

a person who has come to live permanently in a country without legal permission

trabalhador indocumentado

a person who is employed in a country without the legal right to work there

uma pessoa que está empregada em um país sem o direito legal de trabalhar lá

a person who moves to a foreign country, often for work, without official authorization

a term, often with legal or negative connotations, for a foreigner who has entered a country without authorization

the process of people moving into a country to live without the required legal documents