Regulation (EU/Euratom) No 883/2013 of the European Parliament and of the Council of 11 September 2013 concerning investigations conducted by the European Anti-Fraud office (OLAF) and repealing Regulation (EC) No 1073/1999 of the European Parliament an...

Article 9. Procedural guarantees:
1. In its investigations the Office shall seek evidence for and
against the person concerned. Investigations shall be conducted
objectively and impartially and in accordance with the principle
of the presumption of innocence and with the procedural guarantees
set out in this Article.