A/HRC/35/25/Add.2 movements and stresses that, whatever the actors, the focus should remain exclusively on saving lives. 3. Reception and identification process 39. Migrants arriving on the Greek shore or rescued at sea are brought to the reception and identification centres for the registration and identification process, fingerprinting, and Eurodac registration conducted by the Greek police and assisted by Frontex. 40. The Reception and Identification Service and the police conduct a first interview to identify vulnerabilities. The European Asylum Support Office provides support in identifying persons who wish to apply for asylum. It also provides information on the relocation procedure and operational support to the Dublin Unit, and has provided infrastructure in terms of office space and equipment, as well as hundreds of interpreters to interpret from the languages of asylum seekers into English. Law 4399/2016 further enables European Asylum Support Office officials to conduct interviews of applicants on the merits in the context of the exceptional procedure applied at the border, with decisions taken by the Greek Asylum Service. 41. At arrival, Frontex also conducts debriefing interviews to gather intelligence on smuggling and trafficking networks, following which Europol runs second-line checks to identify possible smugglers and report them to the national authorities. The Special Rapporteur strongly recommends that adequate safeguards be put in place in order to ensure that these interviews take place on a strictly voluntary basis. Such interviews should not take place upon arrival, as often migrants are traumatized from the journey and such interviews may increase their fear of the authorities and lead them to hide protection needs, abuse suffered or vulnerabilities experienced. 4. Return 42. The European Union has funded an emergency forced return programme under the Asylum, Migration and Integration Fund, implemented by the Greek police. Frontex supports building return capacities through screening, facilitating cooperation with embassies, and coordinating detention and return flights. 43. The European Union’s assisted voluntary return programme provides up to 1,000 migrants per year with the possibility of voluntarily returning to their countries of origin. Since 2010, with funding by the European Return Fund and the Greek authorities, the International Organization for Migration has implemented the assisted voluntary return of third-country nationals to their country of origin. By 18 May 2016, the International Organization for Migration had registered 3,024 migrants since the beginning of that year who wished to return to their country of origin. 11 III. Detention practices and legislation A. Pre-removal detention centres 44. According to Law 3907/2011, detention for third-country nationals for the purpose of return is applied when there are no other adequate and less restrictive measures and when: (a) there is a risk of absconding; or (b) the third-country national avoids or hampers the preparation of return or the removal process; or (c) there are reasons of national security. Law 3907/2011 allows for a maximum period of detention of 18 months. 45. At the time of the visit, around 1,200 migrants were held in pre-removal detention centres, in Petrou Ralli, Amygdaleza, Corinth, Xanthi, Paranesti and several police stations across the country. 11 See www.iom.int/sites/default/files/situation_reports/file/Europe-Med-Migration-ResponseSitrep21-19May.pdf. 7