The unethical advertising does not necessarily have to be forbidden. Sometimes a thing arousing common objection is not prohibited. The thing forbidden may only be something synonymously codified. The unethical advertisement which affects ones subconsciousness, constitutes an interesting instance. It was and has been of interest not only of scientists but also various impostors. Zigmund Freud was the one who proved that subconsciousness plays an enormous role in human’s life and may govern one’s acting without the consciousness taking part. There is nothing more tempting for advertising specialists, then and as a result, majority of countries forbids this kind of activity. In Poland as well, in “The Law Concerning Combating the Unfair Competition” (1993), such practices were prohibited. In the art. 3, law 1 it is said that by the unfair competition we understand acting against the law or against good custom if it establishes a threat or violates other contractor’s or client’s business. In the art. 16, law 1, point 4, one may read that such a deed in the advertising domain stands for the utterance, which by encouraging to purchase or to make use of particular service makes an impression of a neutral information. In particular, we mean here the so-called hidden advertisement or cryptoadvertisement. For many years the Polish legislator had not perceived it as necessary to refer to the subconscious or unethical (subliminal) advertisement.