15 C.F.R. § 2004.22
(f) Verification of identity. When making a Privacy Act request, you must verify your identity in accordance with these procedures to protect your privacy or the privacy of the individual on whose behalf you are acting. If you make a Privacy Act request and you do not follow these identity verification procedures, USTR cannot process your request.
(1) How do I verify my own identity? You must state your full name, current address, and date and place of birth. In order to help identify and locate the records, you also may, at your option, include your Social Security number. To verify your own identity, you must provide an unsworn declaration under 28 U.S.C. 1746, a law that permits statements to be made under penalty of perjury. To fulfill this requirement, you must include the following statement just before the signature on your request:
I declare under penalty of perjury that the foregoing is true and correct. Executed on [date].
(2) How do I verify parentage or guardianship? If you make a request as the parent or guardian of a minor, or as the guardian of someone determined by a court to be incompetent, for access records or information about that individual, you must establish: