554.3601  Discharge and effect of discharge.
  1.  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