An immigration officer controls the movement of non-citizens in and out of his country.
When a non-citizen enters a country, the immigration officer is often the person’s first point of contact. He traditionally asks them a predetermined set of questions before authorizing their entrance into the country.
If a visitor’s answers to these questions are satisfactory, a visa is normally issued by the immigration officer. This visa commonly stipulates how long a person is authorized to be in the country and if they are legally sanctioned to work for a salary during their stay.
In the event the improprieties of the visitor are serious or may pose a threat to national security, the person may be refused admittance and sent back to his or her country of origin.