The utilization of determinate data of the Census in order to check out that the persons who take part in an initiative of civic participation in the town gather the requirements of participation previously defined is in agreement with the legislation of data protection if it is carried out in exercise of municipal competences in which the condition of neighbor is an essential element. With independence of the system of vote that is used, it is necessary to watch over the fulfillment of the rest of derived duties to the regulations of protection of data, especially the principle of quality, the confidentiality and the adoption of the necessary safety measures.