31 institutions lack staff, which then causes adverse consequences for both staff members and beneficiaries. The NPM conclusion is that among persons deprived of liberty, persons with mental and/or intellectual disorders placed in the social-protection institutions of a home type or psychiatric hospitals are in the most disadvantaged position, as well as those persons in the institutions for the enforcement of criminal sanctions77. In the course of 2015, NPM paid a special attention to monitoring the status of a large number of refugees and migrants, who, in the course of the refugee crisis went through the Republic of Serbia. According to the data of the Ministry of the Interior, in the course of 2015 almost 600,000 refugees/migrants were registered and issued certificates of having expressed the intention to seek asylum. Majority of them did not express the intention to get asylum in the Republic of Serbia, but the police officers despite that fact issued them certificates on the expressed intention to seek asylum (almost all those persons left the territory of the Republic of Serbia in a two-day time). Besides the aforementioned, another huge problem was the fact that transition of refugees through Serbia was not organized in an efficient way and that in such a situation risks of corruption and actions by informal groups were very big.78 In the course of 2015, state authorities took a liberal approach for treatment of refugees in transit. That implied no deprivation of liberty, and lack of any other restrictive measures. Refugees were enabled a smooth entry to Serbia, and upon registration, they were let to freely pass through Serbia taking the roads to the borders with Hungary and Croatia. Such a liberal approach opened a room for actions of informal groups to take advantage of a difficult position of refugees for their personal interest. 6.1. Police / prosecutorial detention In order to monitor the way police officers treat the persons brought to their premises, arrested and detained persons, the National Prevention Mechanism visited the total 28 police stations in the course of 201579. The total of 11 reports on the visits to the police administrations were composed in the course of 2015. The reports on the visits contain the total of 129 recommendations. Out of the total of 129 recommendations, the competent authorities complied with 73, partially complied with 51, and did not comply with 5 recommendations. The recommendations related to the improvement of the accommodation conditions within the premises for detention (improvement of the artificial and natural light, inflow of the fresh air and ventilation and improvement of the hygiene conditions) were mainly complied with. On the other hand, the recommendation that required material investments (reconstruction of the space, installation of the heating devices, installation of the CCTV or alarm system for calling police officers and similar) were not implemented, but the competent departments of the Ministry of the Interior were informed about the necessary adaptation of the space and necessary costs thereto so as to decide about the further measures. The lack of financial resources is mainly mentioned as the reasons for noncompliance with the recommendations. 77Persons serving measure of compulsory psychiatric treatment and stay in the health-care institutions, measures of detention and prison sentence 78Analysis: Difference in treatments of refugees passing the Balkan route, no. 71-120/15 from 02/09/2016 79 Within 11 police administrations