It is an unlawful practice for any person to promote or advertise any business, product or interest in property by means of distributing documents designed to simulate checks or other negotiable instruments, unless such instrument has printed upon both the front and back, the following statement: “This is not a Check”. However, it is not an unlawful practice under this section for a person to distribute for commercial purposes a sample or specimen of a check or other instrument which is used to solicit orders for the sale of that instrument and which is clearly marked as a non-negotiable sample or specimen.