ARS § 13-2002 defines Arizona's forgery law. In Arizona, Forgery is specifically defined under A.R.S. 13-2002 as: Falsely making, completing or altering a written instrument.Most types of forgery are categorized as class 4 felonies. A conviction could mean up to 15 years in prison plus 3 more years of probation. James Novak, experienced forgery defense attorney will personally provide you with a FREE consultation. Call (480) 413-1499 today. Any document that has been falsified or altered for the purpose of deceiving others is considered a forgery in Arizona. Forgery is a Class 4 felony in Arizona, which means a conviction can carry significant penalties, including imprisonment and fines. A successful forgery prosecution in Arizona can subject you to a maximum of eight years and hefty fines.