A birth affidavit should be submitted (with an application for a U.S. passport) when an acceptable birth certificate cannot be obtained for a person born in the United States and must be accompanied by a notice from the appropriate authorities indicating that no birth record exists. A birth affidavit may also be submitted in conjunction with other birth records. A birth affidavit must be made by a person who has personal knowledge of the facts of the birth of the person whose birth in the United States is to be proved. The affidavit shall state briefly how his/her knowledge was acquired. It is preferred that the affidavit be made by an older blood relative, although it may be made by the attending physician or any other person who has personal knowledge of the birth.