How do I get my Certificate of Citizenship? Some people may become US citizens by operation of law even if they were not born in the United States. For example, if you were born outside of the US, but one or both of your parents were US citizens at the time of your birth, or if you were adopted as a child by one or more US citizen parents, you may already be a US citizen. in Public bookmarkswith certificate_of_citizenshipform_n-600us_citizenship