A work permit or work visa is the permission to take a job within a foreign country. The foreign country where someone seeks to obtain a work permit for is also known as the "country of work", as opposed to the "country of origin" where someone holds citizenship or nationality.

Permanent residency is a person's legal resident status in a country or territory of which such person is not a citizen but where they have the right to reside on a permanent basis. This is usually for a permanent period; a person with such legal status is known as a permanent resident. In the United States, such a person is referred to as a green card holder but more formally as a Lawful Permanent Resident (LPR).