The fulfillment of the principles and duties to the LOPD, especially the regime applicable to the sensitive data, has to govern the management and the procedure of the particulars on the part of the OAC, independently of whom the physical person is addressee. The OAC having access is legitimate to the data that identify the emitter and the addressee of a document or writing, as well as to the particulars included in the documentation, in order to proceed to its register and procedure, in the terms of Law 30/1992. However, the Judgement makes nuances with respect to the mail that could qualify itself as "private", especially regarding the writings addressed to the mayor, to the town councilors or to the municipal groups. Among others, the consistent option in which the OAC does not open the mayor or the town councilors the addressed mail, leaves it in the corresponding mailbox and the addressee is the one that, in case the document has relation with municipal performances of competence, sends it to the OAC for its register, it adapts to the regulations of protection of particulars. These considerations can be extensible in the mail addressed to the municipal Groups.