A person commits forgery in Florida when he, with intent, falsely makes, alters, forges or counterfeits any written instrument. Forgery is a serious crime that can lead to a felony charge and a prison sentence of up to five years with five year's probation.Forgery in Florida involves falsifying, altering, counterfeiting, or forging a document with legal significance, with the intent to defraud or injure someone. 817.535 Unlawful filing of false documents or records against real or personal property.