Acknowledgements T his guide was written by Jean-Sébastien Blanc, Director of Thematic Programmes at the APT. A first draft was reviewed during a peer-review meeting held at the Jean-Jacques Gautier Center in Geneva on 15 and 16 March 2018. The APT wishes to acknowledge the valuable contributions received by the experts who participated in the meeting: Caterina Bolognese (European Committee for the Prevention of Torture), Mauro Cabral Grinspan (Global Action for Trans Equality), Catherine de Preux (Office of the High Commissioner for Human Rights), Daniela de Robert (Italian National Preventive Mechanism), Amy Fettig (American Civil Liberty Union), Sara Guérin Brunet (French National Preventive Mechanism), Simon Karunagaram (Malaysian National Human Rights Institution), Richard Köhler (Transgender Europe), Marcin Kusy (Polish National Preventive Mechanism), Kalekye Kyalo (Office of the High Commissioner for Human Rights), Victor Madrigal-Borloz (United Nations Independent Expert on protection against violence and discrimination based on sexual orientation and gender identity), Nicholas Opiyo (Chapter Four Uganda), Pooja Patel (International Service for Human Rights). The APT is also grateful to the following experts who reviewed the draft: Josefina Alfonsín (Federal Ombudsman of Prison of Argentina), Zhan Chiam (International Lesbian, Gay, Bisexual, Trans and Intersex Association), Natália Damázio (Local Preventive Mechanism of Rio de Janeiro), Natalie Deffenbaugh (International Committee of the Red Cross), Mariana Lauro (Federal Ombudsman of Prison of Argentina), Renata Lira (Local Preventive Mechanism of Rio de Janeiro), Bertho Makso (Proud Lebanon), Grant Mitchell (formally International Detention Coalition), Mary Murphy (International Committee of the