Del. Code tit. 16, § 3130

Certificates filed within 6 months after the time prescribed therefor shall be prima facie evidence of the facts therein stated. Data therein pertaining to the father of the child are prima facie evidence only if the alleged father is the husband of the mother. The data pertaining to the father of the child are not evidence in any proceeding adverse to the interests of the alleged father or of his heirs, next-of-kin, devisees, legatees or other successors in interest if the father is not the husband of the mother and the paternity is not acknowledged.