Libertas.eu scheduled an official press conference for 17 April 2009[5] but details began to be leaked on 15 April 2009.[5] Libertas.eu's candidates in Spain would stand as individuals alongside candidates from Citizens – Party of the Citizenry (usually abbreviated to "C's") under a common list branded with the Libertas identity.[5] The name of the list was variously reported as Ciutadans en las Europeas[5] or Libertas – Ciudadanos de España[1][5][6] or Ciudadanos – Partido de la Ciudadanía y Libertas.[7]
The official press conference took place on 17 April 2009[5] and "C" later issued a communique giving the principles under which the list would contend the election.[6] The list was registered with Spain's Central Electoral Commission under the name Libertas – Ciudadanos de España.[9]
"C's" alliance with Libertas was subject to approval by an April extraordinary session of "C's" General Council, although Robles stated that party chairman, Albert Rivera had already approved it[10] and that the election office and money were already in place.[10] That extraordinary session approved the alliance[11] and Robles immediately resigned his party membership.[11]
Member parties are members of Libertas.eu. Members of member parties are automatically members of Libertas.eu unless they choose otherwise.
2
Affiliated parties are not members of Libertas.eu but are otherwise associated. Members of affiliated parties are not members of Libertas.eu unless they choose to join as individuals.
3
Parties presenting as Libertas.eu affiliates/members but not sanctioned by Libertas.eu when presentation commenced.