Neb. Rev. Stat. §§ 77-1833
The service of notice provided by section 77-1832 shall be proved by affidavit. The purchaser or assignee shall also affirm in the affidavit that a title search was conducted by a registered abstracter to determine those persons entitled to notice pursuant to such section. If personal or residence service is used, the receipt or returns provided by the person authorized in subsection (2) of section 77-1832 to carry out such service shall be filed with and accompany the affidavit. If certified mail or designated delivery service is used, the certified mail return receipt or a copy of the signed delivery receipt shall be filed with and accompany the affidavit. The affidavit, a copy of the notice, and a copy of such title search shall be filed with the application for the tax deed pursuant to section 77-1837. For each service of such notice, a fee of one dollar shall be allowed. The amount of such fees shall be noted by the county treasurer in the record opposite the real property described in the notice and shall be collected by the county treasurer in case of redemption for the benefit of the holder of the certificate.
Neb. Rev. Stat. §§ 77-1833