Neb. Rev. Stat. §§ 25-21,223
The summons shall be issued and directed with a copy of the complaint attached to the summons, shall state the cause of the complaint, the time and place of trial of the action for possession, and the answer day for other causes of action, and shall notify the defendant that if he or she fails to appear, judgment shall be entered against him or her. The summons may be served and returned as provided in sections 25-505.01 to 25-516.01, except that the summons shall be served within three days, excluding nonjudicial days, from the date of its issuance and shall be returnable within five days, excluding nonjudicial days, from the date of its issuance. If service cannot be made with reasonable diligence under such sections, service may be made by any person by leaving a copy of the summons at the detained premises and mailing a copy by first-class mail to the defendant's last-known address. The person making the service shall file with the court an affidavit stating with particularity the manner in which he or she made the service and, if service was not made as provided in sections 25-505.01 to 25-516.01, the reasons why service under such sections was unsuccessful. Trial of the action for possession shall be held not less than ten nor more than fourteen days after the date of issuance of the summons.
Neb. Rev. Stat. §§ 25-21,223