Seals abolished.

The use of private seals in written contracts, or other instruments in writing, by individuals, firms, or corporations that have not adopted a corporate seal, is hereby abolished; but the addition of a seal to any such instrument shall not affect its character or validity in any respect. [C51, §974; R60, §1823; C73, §2112; C97, §3068; S13, §3068; C24, 27, 31, 35, 39, § 9439; C46, 50, 54, 58, 62, 66, 71, 73, §537.1; C75, 77, 79, 81, §537A.1 ] Corporate seals, §490.302 , 504.302 , 558.2 et seq.