Forgery is considered a felony in all 50 states and Washington is no exception. A person is guilty of forgery if, with intent to injure or defraud: (a) He or she falsely makes, completes, or alters a written instrument.Use this instruction for possessing, offering or disposing of a forged instrument, which is only one of the ways of committing forgery. Forgery is the crime where you falsely make a certain writing or possess a writing that you know is forged. Washington recognizes forgery as a Class C felony. What is the Punishment? The Revised Code of Washington's "Fraud Statute" (Chapter 9a.