• The purpose for which they handled it.36 An accurate log containing all of this information for each collected piece of information will enable investigators, lawyers and judges to determine the authenticity of the information or item and the likelihood of someone having tampered with it. Should it prove impossible to collect this information, the reasons for such inability should be recorded. 37 It is advised to try to limit the number of people with access to the information under custody as this minimizes the chance of the chain of custody being broken and information being tampered with, and thus causing a decrease of evidentiary value of the information concerned. Create a record that documents all authorized access and the reason for such access, dated and signed by both the custodian and those granted access, for each document or item. Doing so will help ensure the credibility of the evidence, regardless of how it is ultimately used. See the Appendix to this Handbook for template Chain of Custody forms, which can be used as a means for keeping a log of such information, as well as Section 3.1.1 for further suggestions. 2.1.9 Protection of Documentation Any personal information that an individual discloses during an interview is to be considered confidential and is to be treated accordingly. 38 This means that there is an understanding that the disclosed information will not be shared with others unless the person concerned gives explicit and informed consent to do so, being fully informed of all the risks that disclosing the information may entail.39 36 International Criminal Tribunal for the former Yugoslavia, ICTY Manual on Developed Practices, 28 (2009), available at http://www.icty.org/sid/10145. 37 International Bar Association and Raoul Wallenberg Institute of Human Rights and Humanitarian Law, The Lund-London Guidelines), 7 (2009). 38 World Health Organization, WHO Ethical and safety recommendations for researching, documenting and monitoring sexual violence in emergencies, 9 (2007), available at http://www.who.int/gender/documents/OMS_Ethics&Safety10Aug07.pdf; Physicians for Human Rights, Curriculum Companion: Program on Sexual Violence in Conflict Zone, Cross-Sectorial Training, UNPUBLISHED. 39 Global Protection Cluster, Handbook for Coordinating Gender-based Violence Interventions in humanitarian Settings, Annex 35 (2010), available at http://www.unicef.org/protection/files/GBV_Handbook_Long_Version.pdf; The Sphere Project, Humanitarian Charter Minimum Standards in Humanitarian Response, 35 (2011), available at https://www.ifrc.org/docs/idrl/I1027EN.pdf; Physicians for Human Rights, Curriculum Companion: Program on Sexual Violence in Conflict Zone, Cross-Sectorial Training, UNPUBLISHED. 37