Certain immigrants require a waiver of inadmissibility before they may receive lawful permanent residency. Reasons for a waiver are numerous but include certain criminal convictions, previous removals or deportations, or simply being in the United States unlawfully (by far the most common). The process of obtaining a waiver differs depending on the facts of each case. Starting in 2013, certain unlawful presence waivers may be obtained in the U.S. prior to the immigrant departing for their consular interview. These waivers are known as stateside waivers or provisional unlawful presence waivers.