TH Davidson and Company v. Eidola Concrete, 972 N.E.2d 823

Kilbride, as Eidola Concrete co-manager, signed a guaranty on Davidson's credit application for a line of credit.
The application originally requested a $1,000 credit line and was later altered by Davidson’s CFO to $3,000, though Kilbride claims he did not consent to the increase.
Kilbride testified he signed a personal guaranty for $1,000, not for the full amount claimed by Davidson.
Davidson proved Eidola Concrete owed $5,600.80; the circuit court found the guaranty unambiguous and continuing, covering any amount owed.
Trial records showed Eidola later paid $3,000 on the debt, but the court held Kilbride liable for the full continuing guaranty amount.
On appeal, Kilbride and Eidola argued the guaranty limited liability to $1,000, but the court affirmed the judgment.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether Kilbride's guaranty is a continuing, unlimited guaranty.	Davidson: guaranty is continuing and covers any amount owed.	Kilbride: guaranty limited to $1,000.	Yes; the guaranty is continuing and unlimited.

McLean County Bank v. Brokaw, 119 Ill. 2d 405 (1988) (contract interpretation governs guaranty scope; no explicit limit defeats liability)
Scovill Manufacturing Co. v. Cassidy, 275 Ill. 462 (1916) (continuing guaranty implied by future course of dealing)
Weger v. Robinson Nash Motor Co., 340 Ill. 81 (1930) (continuing guaranty doctrine supports liability beyond stated amount)
Heeringa v. Ortlepp, 167 Ill. App. 586 (1912) (continuing guaranty confirmed despite express liability limits)
Frost v. Standard Metal Co., 116 Ill. App. 642 (1904) (look to future dealing for continuing guaranty liability)
Taussig v. Reid, 145 Ill. 488 (1893) (credit extension beyond stated amount does not discharge guarantor)
Mamerow v. National Lead Co., 206 Ill. 626 (1903) (where guaranty is continuing and unlimited, duration and amount must be reasonable)