SER2S is the network operator of e-rsb the card authorisation switching network. e-rsb is a trademark of SER2S. SER2S has been created the January 2011 1th, and is a subsidiary of Groupement des Cartes Bancaires CB which is the leading card scheme in France.

„Berlin Group standards is a European promising standard; we firmly believe in an European standard for card as a vector of an open European market“.