Some efforts have been made in order to ensure the mutual recognition of certificates within the Union. However, they have been only partly successful. The most important example in this regard is the Senior Officials Group – Information Systems Security (SOG-IS) Mutual Recognition Agreement (MRA). While it represents the most important model for cooperation and mutual recognition in the field of security certification, SOG-IS includes only some of the Member States. That fact has limited the effectiveness of SOG-IS MRA from the point of view of the internal market.