Neb. Rev. Stat. § 43-156

For purposes of sections 43-155 to 43-160 , unless the context otherwise requires: (1) Adoption involving exchange of information shall mean an adoption of a child in which one or both of the child's biological parents contract with the department for information about the child obtained through his or her adoptive family; (2) Exchange-of-information contract shall mean a two-year, renewable obligation, voluntarily agreed to and signed by both the adoptive and biological parent or parents as well as the department; and (3) Department shall mean the Department of Health and Human Services.