According to the Greek law on trade marks, administrative authorities (the Trade Mark Administrative Commission and the administrative courts on appeal) have exclusive jurisdiction on all disputes relating to the right on a trade mark, while civil courts have exclusive jurisdiction on all disputes relating to a trade mark infringement. Naturally, this dualism in jurisdiction may give rise to several concerns in cases, where there may well be an overlap. A typical example would be a trade mark infringement case, where the defendant raises the objection that the claimant's trade mark, sought to be protected, lacks distinctive character or has become of common use.