Forgery is a white collar criminal offense that involves creating a false written document with the intent to defraud. If you possess a completed or modified written instrument you know is fake and you do so with the intent to defraud or deceive another.Forgery, deceive or injure another, he falsely makes, completes or alters a written instrument which is or purports to be. NYC and White Plains and Westchester County Forgery defense attorneys and lawyers can handle fraud cases involving false documents. Forgery in the Third Degree, New York Penal Law 170.05, is a misdemeanor crime that carries a sentence of up to one year in jail. New York Forgery in the Third Degree is a Class "A" misdemeanor.