(810 ILCS 5/2A-109)
(from Ch. 26, par. 2A-109)
Option to accelerate at will.
(1) A term providing that one party or his or her
successor in interest may accelerate payment or performance or
require collateral or additional collateral "at will" or "when he
or she deems himself or herself insecure" or in words of
similar import must be construed to mean that he or she has
power to do so only if he or she in good faith believes that
the prospect of payment or performance is impaired.
(2) With respect to a consumer lease, the burden of
establishing good faith under subsection (1) is on the party who
exercised the power; otherwise the burden of establishing lack
of good faith is on the party against whom the power has been
(Source: P.A. 87-493.)