The complaint shall contain the name of the administrative authority involved, description of the violation of the right, facts and evidence supporting the complaint, information about the legal remedies already used and data on the complainant. At the request of the complainant, the Secretariat of the Protector of Citizens is obliged to offer technical assistance to draft a complaint, without any kind of compensation. Persons deprived of liberty are entitled to submit their complaints in a sealed envelope. All institutions where there are persons deprived of liberty shall visibly and publicly provide adequate envelopes, which shall be ensured by the management of such institutions and the Ministry of Justice. Article 28 The Protector of Citizens shall act on each complaint except: • if the case is not within the competence of the Protector of Citizens; • if it is filed after the expiry of the statutory deadline; • if it is filed prior to exhausting all available legal remedies, and the requirements specified under paragraph 5 of Article 25 are not fulfilled; • if a complaint is anonymous; • if it does not contain information required to proceed, and the complainant has neither corrected such deficiency even in the period determined for supplementing the complaint nor asked the Protector of Citizens' Secretariat to assist him in correcting such deficiencies. If for any of the reasons specified in paragraph 1 of this Article, there are no grounds for an action of the Protector of Citizens, he/she shall reject the complaint and notify the complainant, stating the reasons for rejecting the complaint. Article 29 The Protector of Citizens shall notify the complainant and the administrative authority involved about the beginning and end of a proceeding. The administrative authority is required to respond to all requests of the Protector of Citizens and to provide all requested information and documents within a period set by the Protector of Citizens that may not be shorter than 15 or longer than 60 days. In certain justified cases, the Protector of Citizens may decide not to disclose to the administrative authority the identity of the person who submitted a complaint. Article 30 If the administrative authority involved eliminates the irregularities by itself, the Protector of Citizens shall so notify the complainant and leave him/her a 15-day period to declare whether he/she is satisfied with such action. If the complainant declares that he/she is satisfied with the manner the irregularity has been corrected, and also when the complainant fails to respond within the set deadline, the Protector of Citizens shall discontinue the proceedings. Article 31 Upon determination of all relevant facts and circumstances, the Protector of Citizens may inform the complainant that his/her complaint is unfounded or may find that irregularities existed in the work of the administrative authority.