Deeds executed by the city treasurer, collector, or person authorized to act as collector, may be in form substantially as provided by section 448.2 , and shall be signed and acknowledged by the treasurer, collector, or other authorized person in the person’s official capacity. [C97, §1019; C24, 27, 31, 35, 39, § 6892; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §420.243 ]