3. If the plaintiff does not request service of the original summons by posting and mailing as provided in subsection 2 of this section, and if the officer, or other person empowered to execute the summons, makes return that the defendant is not found, or that the defendant has absconded or vacated the defendant's usual place of abode in this state, the plaintiff may request the issuance of an alias summons and service of the same by posting and mailing in the time and manner provided in subsection 2 of this section. In addition, the plaintiff or an agent of the plaintiff who is at least eighteen years of age may serve the summons by posting and mailing a copy of the summons in the time and manner provided in subsection 2 of this section. Upon proof by affidavit of the posting and of the mailing of a copy of the summons or alias summons and the complaint, the judge shall proceed to hear the case as if there had been personal service, and judgment shall be rendered and proceedings had as in other cases, except that no money judgment shall be granted the plaintiff where the defendant is in default and service is by the posting and mailing procedure provided in subsection 2 of this section.