An affidavit of the birth mother that the identity of the birth father is not reasonably ascertainable shall be sufficient evidence of this fact, provided there is no other evidence before the circuit court that would refute such an affidavit. The absence of such an affidavit shall not be deemed evidence that the identity of the birth father is reasonably ascertainable. For purposes of determining whether the identity of the birth father is reasonably ascertainable, the standard of what is reasonable under the circumstances shall control, taking into account the relative interests of the child, the birth mother and the birth father.
Va. Code § 63.2-1203