What Is Criminal Possession of a Forged Instrument? Are There Any Other Forgery Crimes?Additional Forgery Resources: newyorkcriminallawyer-blog. If you are facing a forgery charge, it is important to consult with a New York Fraud lawyer as soon as possible. No, it is not illegal. But if you fake someone else signature and claim is their signature is also fraud (forgery). Signing another's name with permission is not forgery, but be sure that you sign in a way that reveals the permission. A New York City criminal defense lawyer from Greco Neyland, PC discusses common defenses to charges of forgery. Have you been charged with forgery in NY? Get a former prosecutor on your side.