W. Va. Code § 48-2-106
At the time of the execution of the application, the clerk or other person administering the oath to the applicants shall require evidence of the age of each of the applicants and shall not issue a license until it has been confirmed that each applicant satisfies the age requirements for marriage set forth by §48-2-301 of this code. Evidence of age may be as follows:
(5) Other good and sufficient evidence.
PART 3. CAPACITY TO MARRY.