On 2 December 2022, OLAF signed an administrative cooperation working arrangement with the United Nations High Commissioner for Refugees (UNHCR). Even though the arrangement does not establish new obligations under international and EU law, it aims at strengthening and streamlining the existing cooperation between OLAF and the UNHCR, in order to better protect humanitarian aid from fraud. When signing the arrangement, OLAF Director-General Ville Itälä and Inspector General of the UNHCR Anthony Garnett stressed the importance of the fight against fraud in this area since the EU is the third largest donor to the UNHCR after the United States and Germany, giving €179 million in 2021 to help protect refugees and the forcibly displaced.

The arrangement deals with the exchange of information between the two bodies, cooperation in investigative activities, risk analysis and training.

It is the fourth cooperation arrangement that OLAF signed with UN offices and agencies, the other three being with: the Office of Internal Oversight Services of the United Nations Headquarters; the Office of Audit and Investigations of the United Nations Development Programme (UNDP); the United Nations Office for Project Services (UNOPS).