To be considered green card eligible immigrants must meet certain criteria. According to U.S. Citizenship and Immigration Services one of the criteria is for immigrants to be 'admissible' to the United States. While this requirement may seem fairly vague looking into it further can help individuals seeking permanent residency understand what it takes to be considered admissible.
Being 'admissible' simply means being eligible for admission. Some of the factors that are taken into consideration when declaring admissibility are the health issues, criminal behavior and security risks of the applicant. Health issues that are considered inadmissible are communicable diseases or mental and behavioral issues that pose a threat to the public.
Criminal history that may deem an individual inadmissible is having two or more criminal convictions of any kind or where the total sentence served for all convictions was five or more years. Crimes of moral turpitude will automatically classify an applying immigrant inadmissible to the U.S.
When deciding if an applicant poses a security risk, the USCIS will look into the actions of an applicant before their arrival to the U.S. for any behavior or activity of a terrorist nature. Any involvement of persecution, genocide or torture during an applicant's lifetime will deem them inadmissible.
When an immigrant applied for residency their eligibility requirements are reviewed. If they are found to be inadmissible they can file an I-601 form to wave their inadmissibility. I-601 forms are filed for most immigrants and can help excuse certain eligibility requirements that were not met through the application process. For help with this and other aspects affecting permanent residency, immigrants should speak to an experienced immigration attorney.