This volume contains detailed information on the law on ‘informal relationships’ in 30 European countries. An informal relationship refers to a relationship that is not formalised as a marriage or as a registered partnership/civil union between a couple. The expert members of the CEFL have drafted national reports on the basis of a detailed questionnaire. This book integrates all the responses in order to provide an overview and a straightforward simultaneous comparison of the different solutions chosen within national systems.