Iowa Code § 618.8
If a newspaper refuses to publish a statutorily required public notice, a government body, as defined in section 22.1, satisfies public notice requirements with respect to that public notice by posting the public notice on the official internet site of the government body and forwarding the notice to each county in which notice is required to be given to any person and to the statewide public notice internet site established pursuant to section 618.3A if such an internet site exists. A county receiving a public notice pursuant to this section shall post the public notice on the county's internet site within seventy-two hours of receipt. The statewide public notice internet site shall post a public notice forwarded pursuant to this section within seventy-two hours of receipt.
Iowa Code § 618.8