Idaho Code § 50-1822
The city treasurer shall, before the city shall be entitled to a deed, make an affidavit of his having complied with the conditions thereof, stating particularly the facts relied on as constitute such compliance, which affidavit shall be delivered to the city clerk to be by such officer entered on the records of his office and preserved in the files of his office. The city treasurer shall also cause to be filed with the city clerk an affidavit by the publisher, owner or editor of the official newspaper of the city in which notice of time of taking deed was printed and published, which said printed notice and affidavit of publication shall be filed and preserved among the files of the city clerk. The affidavit of the city treasurer as herein provided and of the publisher, owner or editor of such official newspaper shall be prima facie evidence in all courts that such notice has been given and published as therein stated. Any person swearing falsely to such affidavit shall be deemed guilty of perjury and punished accordingly.
Idaho Code § 50-1822