Free Consultation - Call (312) 902-3344 - This page covers the state legislation, punishments, examples and possible legal defenses concerning forgery. 17-3) Sec. 17-3. Forgery.Indicate all employment since your Illinois Detection of Deception license expired, to present. 4. Supporting Document RS must be completed. In Illinois, in its simplest terms, forgery can be understood as the knowing and willful falsification of signatures, documents, or objects.