A waiver of inadmissibility allows certain foreign nationals who are otherwise ineligible for a visa or green card to overcome grounds of inadmissibility. Common grounds include unlawful presence, certain criminal convictions, misrepresentation, or prior removals. Eligible applicants typically must demonstrate that denial of admission would cause extreme hardship to a qualifying U.S. citizen or lawful permanent resident spouse or parent. Some waivers, like the I-601A provisional unlawful presence waiver, allow individuals to remain outside the U.S. during processing.