Acting on the recommendations of the NPM, the Centre Principovac has established method of keeping records on the number of persons arriving in the Center, as well as on their gender and age. In accordance with the recommendation addressed to the Center, house rules are visible and translated into English, Arabic and Farsi. Also, the Commissioner has further improved the living conditions in the Center in a manner that is qualified heating system and provided conditions for regular replacement of sheets, upon receipt of a new persons in the Center.

The Ombudsman in carrying out the work of the NPM in September 2015, visited the Regional Center of the border police to the Croatian border crossing Sid, as well as the reception center Principovac. Reports on the visits were sent to the competent authorities. To the Commissioner for Refugees and Migration and to the Centre Principovac three recommendations were issued, in order to improve treatment.