Must be recorded.

Iowa Code § 169A.3, under MARKING AND BRANDING OF LIVESTOCK.

Iowa Code § 169A.3

Evidence of an animal’s ownership shall not be established in court by the animal’s brand, unless the animal is livestock, the brand complies with the requirements of this chapter , and the brand is recorded as provided in sections 169A.4 and 169A.6 or 169A.9 . [C66, 71, 73, 75, 77, 79, 81, §187.3 ] C93, §169A.3 95 Acts, ch 60, §3