Legal Personality and The European Union

After the Treaty of Lisbon the European Union (EU), has a legal personality and it can be sued by anyone of the member state or any citizen of EU. The European Community has the power to conclude and negotiate agreements in line with its external powers, to become a member of an international organisation and to have delegations in non-member countries. The question of the Union's legal personality has essentially been raised in connection with international relations, especially the power to conclude treaties or accede to agreements or conventions. The Union does not have institutionalised treaty-making powers, i.e. international capacity to enter into agreements with non-member countries. However, it pursues its own objectives at international level, whether by concluding agreements through the Council of the European Union or by asserting its position on the international stage, especially in connection with common foreign and security policy (CFSP).

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http://europa.eu/scadplus/glossary/union_legal_personality_en.htm