Filling out an empty document with false information is blank document forgery. An unnatural tremor can be an indicator of document forgery.Tremors can happen because someone was nervous when they were writing. The three types of forgery are document forgery, signature forgery, and art forgery. Is forging a signature a felony? Common example of forgery are presenting fake checks, fraudulent impersonation of another person or creating fake documents for property. There are 3 forgery crimes in New York. Illinois law punishes forgery in three different classes. A Class 3 felony applies to most circumstances of forgery. If the document has been submitted to the court, you can simply report your concerns to the court (Judge) itself.