The DS-71 passport form is used to prove the identity of the passport applicant. An identifying witness will complete the DS-71 form to act as an affidavit of identifying the passport applicant. You can download the DS-71 form here.
This form is used for the purpose of establishing the identity of a passport applicant who has not submitted adequate evidence with his or her passport application. Usually, this is due to insufficient IDs or lack of primary identification and supplemental identification. This afﬁdavit is executed by a witness who can identify the applicant.