Visa Requirements & Letter of Invitation
The documents you need to enter Spain vary depending on where you are from.
If you are a citizen of the European Union, Switzerland, Norway, Iceland, and Liechtenstein, all you need is your Identification Card, or a valid passport. Minors travelling with their ID card must have a document that shows parental authorisation.
The Spanish Ministry of Foreign Affairs provides lists of third countries whose nationals must be in possession of visas when crossing the external borders and of those whose nationals are exempt from that requirement. If you are a citizen of a country that is exempted from the visa requirement, all you need is a valid passport to enter Spain, where you can stay for a maximum of 90 days.
If you are from any other country according to the criteria of the EU, you must request a visa at a Spanish Consulate in your country of residence. You will also need a valid passport.
For these cases, Spanish authorities may ask documents showing where you will stay, confirmation of an organised tour, return air tickets, tourist circuit, or a personal invitation letter. You may also be asked to show proof of having enough financial resources to support yourself during your stay in Spain. Since conditions may vary, we recommend you contact your local Spanish Consulate or Embassy for more information on these requirements. More information can be found at the Ministry of Foreign Affairs.
Letter of Invitation
Participants that require an official letter of invitation in order to obtain a visa, to raise travel funds or for administrative purposes should apply for this invitation by at least 8 weeks prior to the meeting at the very latest. It should be understood, however, that such an invitation is not a commitment on the part of the organisers to provide financial support. The deadline for requesting a Letter of Invitation is 31 August 2012.
It should be understood that the organisers can only issue an invitation which includes the period of the conference plus the Saturdays and Sundays directly before and after the conference, respectively.