On February 7, 2014, the First District Appellate Court of Illinois held that a contract provision stating the agreement could only be terminated upon the express written consent of both parties created a perpetual contract, and was therefore void as contrary to public policy.

On March 8, 2013, the Illinois Appellate Court, First District, held there must be evidence that a principal indicated an agent was authorized to bind the principal to a contract prior to its signing, or that the principal had knowledge of the contract, for the principal to be liable under claims of apparent authority or ratification.

On August 30, 2011, the Appellate Court for the Third District of Illinois reversed a circuit court's denial of a motion to compel arbitration.

On July 19, 2010, the Appellate Court of Illinois, First District, upheld a section 2-615 motion to dismiss from the Circuit Court of Cook County, finding that the 2008 global credit crisis was not adequate grounds to rescind a contract under the doctrine of impossibility of performance.

A third-party client is now legally responsible to pay wages and payroll taxes to licensed day and temporary labor service agencies for the services performed according to the terms in the respective invoices and agreements. (820 ILCS 175/30). 

On June 30, 2010, the Appellate Court of Illinois, First District, reversed a decision of the Circuit Court of Cook County, finding that a contractor's procedural violations of the Home Repair and Remodeling Act ("the Act") (815 ILCS 513/1 et seq) did not preclude the contractor from asserting a mechanic's lien or breach of contract claim.

On September 30, 2009, the Illinois Appellate Court, Second District, affirmed in part and reversed in part the Circuit Court of Du Page County's decision to grant the defendant's motion to dismiss a complaint stemming from an unpaid construction bill, and remanded the case for further proceedings. 

On August 20, 2008, the Illinois Appellate Court, First District, affirmed the judgment of the Circuit Court of Cook County finding that the defendant had committed legal malpractice.

On February 21, 2008, the Illinois Appellate Court, First District, affirmed the judgment of the Circuit Court of Cook County denying the plaintiff's request for a preliminary injunction.

On January 30, 2008, the Illinois Appellate Court, Fifth District, affirmed the judgment of the Circuit Court of Christian County awarding the plaintiffs $10,000 plus costs for the defendant's failure to provide the plaintiffs with a real estate disclosure statement. 

On March 23, 2006, the Illinois Supreme Court reversed the decision of the Illinois Appellate Court, Fifth District, which held that mandatory arbitration agreements between employers and employees are only valid if entered into "knowingly and voluntarily" by the employee.