Iowa Code § 169A.7: Unlawful use of brand — penalty.

A person shall not use any brand for branding livestock, unless the brand has been recorded as provided by this chapter. A person may use an unrecorded hot brand or an unrecorded cryo-brand, consisting only of Arabic numerals, if the person uses the unrecorded brand in conjunction with the person’s recorded brand, and only for purposes of identifying animals within a herd. However, the unrecorded brand shall not be evidence of ownership. A person convicted of violating this section shall be guilty of an aggravated misdemeanor.