[mn125]

This is what I was able to find on Nebraska and the OBC:

An adopted person 25 years of age or older may request access to the names of relatives or the original birth certificate.
Upon receipt of such a request, the bureau shall look for consent and non- consent (veto) forms. If a birth-parent consent is on file, and there is no veto filed by the adoptive parents, the bureau shall release identifying information to the adoptee.
If no birth parent consent is on file, and if no adoptive parent veto filed, the adoptee will be given the name and address of the court which issued the adoption decree, the name of the agency involved if any, and the fact that an agency may assist the adoptee in searching for relatives.

If the birth parent(s) is/are deceased, and there is no AP or BP veto on file, identifying information shall be released.

If birth parent consent(s) has been filed, and there is no adoptive parent veto, the original birth certificate shall be given to the adoptee.

If there is no birth parent consent on filed, and no adoptive parent veto, the adoptee may ask the agency to undertake a search to seek such consent. Costs shall be borne by the adoptee, irrespective of the outcome. Medical history information contained in agency files shall be provided to an adoptee upon request, with names and place of birth redacted.
Neb. Rev. Stat. 43-113 et. seq.

ugh!