The data can retire to be treated and subject them to treatment when they are suitable, pertinent and non excessive in relation to l’àmbit and determinate, explicit and legitimate purposes for which s’han obtained, in attention at the beginning of quality of the data. In this supposition the law does not foresee the communication that he considers, therefore, the consent would be required from the affected workers by the collective agreement in phase of negotiation. The information could be given in a dissociated way and would not see itself affected the fundamental right to the protection of the data of personal character.