File an online Complaint. Engaging in deceptive trade practice prima facie evidence of intent to injure competitor; other rights of action not limited.These laws prohibit everything from using a fake trademark to altering a used car's odometer. The Office of the Attorney General for Nevada also points out that companies must be honest with consumers about its products. A person engages in a "deceptive trade practice" if, in the course of his or her business or occupation, he or she: 1. Laws prohibiting unfair, deceptive, or abusive business practices protect consumers in each state. ; NEVADA – Deceptive Trade Practices. A person engages in a "deceptive trade practice" when in the course of his or her business or occupation he or she knowingly: The official website of the Federal Trade Commission, protecting America's consumers for over 100 years.