In most cases, one is a U.S. citizen if both of the following are true:
Both parents were U.S. citizens at the time of the child's birth
At least one parent lived in the United States prior to the child's birth.
A person's record of birth abroad, if re
registered with a U.S. consulate or embassy, is proof of his or her citizenship. He or she may also apply for a passport or a Certificate of Citizenship to have his or her citizenship recognized.