The Trademark Counterfeiting Act of 1984 is a United States federal law that amended the federal criminal code to make it a federal offense to violate the Lanham Act by the intentional use of a counterfeit trademark or the unauthorized use of a counterfeit trademark. The act established penalties of up to five years imprisonment and/or a $250,000 fine ($1,000,000 fine for a corporation or other legal entity) for selling or attempting to sell counterfeit goods or services. It increased such penalties for a second or subsequent conviction under the Act.