What Is the Difference Between Forgery and Counterfeit? Both forgery and counterfeiting are crimes involving fraud.Find the right forgery expert witness for your case with ForensisGroup. There are three unique specializations available: cyber operations; cybercrime and fraud investigation; and digital forensics and incident response. Forgery, deceive or injure another, he falsely makes, completes or alters a written instrument which is or purports to be. A forgery, it is called fraudulence. Generally, the primary sent to prison.