Any state court entering a final decree or order in any Indian child adoptive placement after September 6, 1985, shall provide the secretary with a copy of such decree or order together with such other information as may be necessary to show:
When the court records contain an affidavit of the biological parent or parents that their identity remain confidential, the court shall include such affidavit with the other information.
Neb. Rev. Stat. §§ 43-1516