Iowa Code § 904.110
The department shall have an official seal with the words “Iowa Department of Corrections” and other engraved design as the board prescribes. Every commission, order, or other paper of an official nature executed by the department may be attested with the seal.
83 Acts, ch 96, §10, 159 CS83, §217A.9 85 Acts, ch 21, §54 CS85, §246.110 C93, §904.110