Neb. Rev. Stat. § 43-104.18

If a petition for adoption is filed and fails to establish substantial compliance with sections 43-104.08 to 43-104.16 , the court shall receive evidence by affidavit of the facts and circumstances of the biological mother's relationship with the biological father or possible biological fathers at the time of conception of the child and at the time of the biological mother's relinquishment and consent to the adoption of the child, including any evidence that providing notice to a biological father or possible biological father would be likely to threaten the safety of the biological mother or the child or that the conception was the result of sexual assault or incest. If, under the facts and circumstances presented, the court finds that the agency or attorney representing the biological mother did not exercise due diligence in complying with sections 43-104.08 to 43-104.16 , or if the court finds that there is no credible evidence that providing notice to a biological father or possible biological father would be likely to threaten the safety of the biological mother or the child or that the conception was the result of sexual assault or incest, the court shall order the attorney or agency to exercise due diligence in complying with sections 43-104.08 to 43-104.16 .