What Is an I-601 Waiver, and When is it Required? Some foreign nationals may be deemed inadmissible under INA 212(a), which covers bases including unlawful presence, criminal violations, and immigration fraud or misrepresentation. If a foreign national is considered inadmissible, then he or she must obtain a waiver of inadmissibility if they are seeking lawful permanent resident status. Generally, in order to successfully obtain an I-601 waiver, you must prove “extreme hardship” to a qualifying relative is moved to the applicant’s country, and that the qualifying relative can’t remain in the US without the applicant. These hardships are also weighed against “mitigating and aggravating factors.” Note that under the 601A waiver, there might be options to file the 601 waiver while insde the United States.