Glossary of competition terms

This Glossary was prepared by DG COMP and the OECD for non-competition specialists. Each term is enriched with references of national case laws from the e-Competitions Bulletin. (© European Union - © OECD)

Complaint

Request by a natural or legal person who claims a legitimate interest asking the Commission to investigate an alleged infringement of EU competition law and to bring it to an end. Formal complaints oblige the Commission to act (either to find that there is an infringement or to reject the complaint) and give the complainant certain procedural rights, like the right to be heard. Informal complaints (where a complainant refuses disclosure of the information he provides) or anonymous complaints may lead the Commission to open a case, but confer no rights to the complainant.

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