We would like to bring the attention of this tweet posted by Nuria Roca July 2nd, 2013 featuring a product brand called Danone, and where it didn´t put in any time that it was a sponsored tweet. However, other celebrities appeared a few days later with the same hashtag and the same product, which was being announced . Therefore, it is a case of product placement where the principle of truth is violated, no warning that it is a commercial message and its effect could affect the economic behavior of the consumer, because it is conceived as an informative message. It is a unfair harmling competition and a deceptive advertising