Iowa Code § 447.10
If notice in accordance with section 447.9 cannot be served upon a person entitled to notice in the manner prescribed in that section, then the holder of the certificate of purchase shall cause the required notice to be published once in an official newspaper in the county. If service is made by publication, the affidavit required by section 447.12 shall state the reason why service in accordance with section 447.9 could not be made. Service of notice by publication shall be deemed complete on the day of the publication. Fees for publication, if required under section 447.13, shall not exceed the customary publication fees for official county publications.
Iowa Code § 447.10
86 Acts, ch 1139, §8; 97 Acts, ch 121, §23
Referred to in §420.207, 420.240, 420.241, 447.8, 447.13