If the U.S. citizen parent does not meet INA transmission requirements, but the child has a U.S. citizen grandparent who does have the requisite physical presence, the child may be eligible for Expeditious Naturalization under the Child Citizenship Act of 2000. Through this procedure, a child under 18 years of age can become a U.S. citizen via naturalization without having to take up residence in the United States beforehand. However, Expeditious Naturalization cannot be executed at the U.S. Embassy; the child must travel to the United States, and would require a Non-Immigrant Visa for this purpose. An N600 application (and supporting documentation) must be filed with the United States Citizenship & Immigration Service (USCIS) before the child applies for his/her U.S. visa. Please see our Non-Immigrant Visa webpage for more information.