Under Illinois law, forgery is generally considered a Class 3 felony. Free Consultation - Call (312) 902-3344 - This page covers the state legislation, punishments, examples and possible legal defenses concerning forgery.Need a Chicago Forgery Attorney? Call a Cook County Forgery Defense Lawyer from The Davis Law Group, P.C. today at (847) 390-8500. Forged evidence and documents have become more prevalent as parties can use programs such as Adobe Acrobat to alter key documents. From counterfeit signatures to fake documents or unauthorized use of certain electronic devices, forgery can exist in many forms. Our Chicago forgery lawyer has over 15 years of success to bring to your case. Call our team now for a free consultation. Illinois law punishes forgery in three different classes. A Class 3 felony applies to most circumstances of forgery.