Forgery crimes are classified as both felonies and misdemeanors in Pennsylvania, depending on the type of document or instrument involved. According to the Pennsylvania statutes, forgery is the act of reproducing any document, signature, banking note, or a work of art.In Pennsylvania, forgery is defined under criminal law as the act of intentionally trying to harm or defraud someone using imitation or falsification. Forgery. (a) Offense defined. It is forgery when you intentionally try to defraud or injure someone else through writing or printing.