22 CFR 92.23: Taking an affidavit.

The notarizing officer taking an affidavit should:

(a) Satisfy himself, as far as possible, that his notarial act will be acceptable under the laws of the jurisdiction where the affidavit is to be used (see § 92.5);

(b) Require the personal appearance of the affiant at the time the affidavit is taken;

(c) Require satisfactory identification of the affiant; and

(d) Administer the oath to the affiant before the affiant signs the affidavit.