When a subscribing witness denies or does not recollect the execution of the instrument to which the witness’ name is subscribed as such witness, its execution may be proved by other evidence.
Iowa Code § 622.24
Subscribing witness — substitute proof
[C51, §2403; R60, §3996; C73, §3654; C97, §4619; C24, 27, 31, 35, 39, §11277; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §622.24]
Official source: Iowa Legislature. Reproduced from public-domain Iowa statutes; confirm against the official source for the current text. Not legal advice.