Most immigration proceedings are civil matters, including deportation proceedings, asylum cases, employment without authorization, and visa overstay. People who evade border enforcement (such as by crossing outside any official border checkpoint), who commit fraud to gain entry, or who commit identity theft to gain employment, may face criminal charges. People entering illegally were seldom charged with this crime until Operation Streamline in 2005. Conviction of this crime generally leads to a prison term, after which the person is deported if they are not eligible to remain in the country.