XL2-125 1" x 2" Sign by Mark for Iowa Notarization and other states where applicable.
Iowa Code 9B.9 Signature if individual unable to sign.
If an individual is physically unable to sign a record, the individual may direct an individual other than the notarial officer to sign the individual's name on the record. The notarial officer shall insert "Signature affixed by (name of other individual) at the direct of (name of individual)" or words of similar import.
This stamp can make that process easy.