§ 3601. Discharge and effect of discharge.
(a) Discharge.--The obligation of a party to pay the instrument is discharged as stated in this division or by an act or agreement with the party which would discharge an obligation to pay money under a simple contract.
(b) Effect of discharge.--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.