Depending on their nature , investigations are conducted by UNHCR staff ( normally the Investigations Coordinator and one other UNHCR official with relevant experience ) , by the UNHCR Audit Section of the Office of Internal Oversight Services ( OIOS ) , by the Investigations Section of OIOS , or using other resources . The outcome is either referral of the case to the Head of the Human Resources Service ( HRS ) for action in accordance with the Administrative Instruction ( ST/AI/371 ) or a determination that the case should be closed .