This state political disclaimer information for advertising comes from the Iowa Ethics and Campaign Disclosure Board

State:
1. If the sponsor is an individual (or individuals), the attribution must provide the full name and complete mailing address of each person who is responsible for or is paying for the ad. The name(s) shall be preceded by the Phrase "Paid for by."
2. If the sponsor is an organization, the full name and complete mailing address of the organization responsible for the ad must be shown, again preceded by the phrase "Paid for by". In addition, the name of at least one officer of the organization must be shown.
3. If the sponsor is a registered political committee (one which has filed a Statement of Organization with either a County Auditor or the Iowa Ethics and Campaign Disclosure Board), only the name of the committee must be shown, again preceded by the words "Paid for by".
In the case of a newspaper ad bearing many names or signatures of supporters where including addresses would be difficult and expensive, the addresses may be placed on file with the Board or County Auditor and this fact noted in the ad.
If a sponsor is donating labor or materials rather than paying for the advertising, the disclaimer statement should begin "Labor (or materials) donated by". In instances of joint sponsorship, both a "donated by" and a "Paid for by" may be necessary.