The delivery of the fiscal identification number of one registered in the professional association on the part of the Distinguished Bar Association in a Court constitutes a communication of data that have to be clamped in what establishes the art. 11 of the LOPD. This communication to requirement for a Judge for the the exercise of the functions that it has attributed, it adapts to the regulations of data protection, since it has the legal habilitation in the article 11.2.d) of the LOPD and to the article 17.1 of the LOPJ.