Section 3-601 - Discharge and effect of discharge(a) 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.(b) 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.Added 1993, No. 158 (Adj. Sess.), § 12, eff. 1/1/1995.