Commission recommendation 98/257/CE on the principles applicable to the bodies responsible for the out-of-court settlement of consumer disputes
You can find a short resume on
http://europa.eu.int/comm/consumers/redress/out_of_court/commu/acce_just04_en.html.
The detailed list of the EU-Commission can be found on http://europa.eu.int/comm/consumers/redress/out_of_court/commu/database.htm
Commission recommendation 2001/310/CE on the principles for out-of-court bodies involved in the consensual resolution of consumer disputes.
You can find further information on http://europa.eu.int/comm/consumers/redress/out_of_court/database/2001-310/acce_just_2001-310_en.htm