Two types of invalidity can be invoked:
absolute invalidity and relative invalidity.
Absolute invalidity can be invoked by any interested party following the violation of a general interest. It may be held against an indicator which does not meet the conditions for the validity of a trademark, for example illegality or lack of distinctiveness.
Relative invalidity, on the other hand, may be invoked only by the owner of prior rights (trademark, name, family name or copyrights), as it only protects specific interests.
An examination of the chances of success, the registration of the invalidity on the national trademarks’ register, and enforceability against third parties: Dreyfus has a perfect understanding of which actions to take in order to enhance your IP rights.