45 CFR §1626.6

1. (a)A recipient shall require all applicants for legal assistance who claim to be citizens to attest in writing in a standard form provided by the Corporation that they are citizens, unless the only service provided for a citizen is brief advice and consultation by telephone, or by other non-in-person means, which does not include continuous representation.
2. (b)When a recipient has reason to doubt that an applicant is a citizen, the recipient shall require verification of citizenship. A recipient shall not consider factors such as a person's accent, limited English-speaking ability, appearance, race, or national origin as a reason to doubt that the person is a citizen.
   1. (1)If verification is required, a recipient may accept originals, certified copies, or photocopies that appear to be complete, correct, and authentic of any of the following documents as evidence of citizenship:
      1. (i)United States passport;
      2. (ii)Birth certificate;
      3. (iii)Naturalization certificate;
      4. (iv)United States Citizenship Identification Card (INS Form 1-197 or I-197); or
      5. (v)Baptismal certificate showing place of birth within the United States and date of baptism within two months after birth.
   2. (2)A recipient may also accept any other authoritative document, such as a document issued by DHS, by a court, or by another governmental agency, that provides evidence of citizenship.
   3. (3)If a person is unable to produce any of the above documents, the person may submit a notarized statement signed by a third party, who shall not be an employee of the recipient and who can produce proof of that party's own United States citizenship, that the person seeking legal assistance is a United States citizen.