Section 554.3601 - Discharge and effect of discharge1. The obligation of a party to pay the instrument is discharged as stated in this Article or by an act or agreement with the party which would discharge an obligation to pay money under a simple contract.2. Discharge of the obligation of a party is not effective against a person acquiring rights of a holder in due course of the instrument without notice of the discharge.94 Acts, ch 1167, §73, 121, 122