(2) Under subsection (1) of this section, if the person asserting the preclusion fails to exercise ordinary care in paying or taking the instrument and that failure substantially contributes to loss, the loss is allocated between the person precluded and the person asserting the preclusion according to the extent to which the failure of each to exercise ordinary care contributed to the loss.
(3) Under subsection (1) of this section, the burden of proving failure to exercise ordinary care is on the person asserting the preclusion. Under subsection (2) of this section, the burden of proving failure to exercise ordinary care is on the person precluded. [1993 c.545 §47]