In relation to the several suppositions of communication of data brought up, and following the regime of data communication according to which the consent of the headlines is necessary unless the cession is in a law (article 11 of the LOPD) foreseen, s’analitzen the possible legal habilitations with regard to the forecasts of the applicable regulations and of the principles of the protection of data. In the cases in which the consent is necessary by lack d’habilitacions legal that allow the communication, it is reminded that this has to be express in relation to the sensitive data (article 7 of the LOPD). Also s’analitza the belonging, in several suppositions and depending on the information requested, of l’alternativa of substituting the name and surnames of the concrete worker for a numeric coding. All this, without harm of the communication of data in a generic way and not individualized, without making the workers or affected civil servants identifiable.