No visa is required for citizens from the European Union countries.
Spain has agreements for visa exception with many countries, such as: Argentina, Australia, Brazil, Canada, Chile, Costa Rica, Croatia, Guatemala, Israel, Japan, Malaysia, Mexico, Monaco, New Zealand, Nicaragua, Panama, Paraguay, San Marino, Switzerland, Uruguay, USA, Venezuela. Citizens from those countries do not need a visa to enter and stay in Spain for up to 90 days.
Citizens from all other countries do need a tourist visa to enter in Spain. This kind of visa provides coverage for attending scientific conferences, seminars, or meetings. In order to request a tourist visa, you have to contact the Spanish Embassy/Consulate nearest to your city. This must be done several months before the conference is set to take place, since visa applications can take quite some time.
Letter of invitation
We will provide a letter of invitation for those participants who request one. If you need such a letter, please send to us an e-mail (constellation10 at iac.es) with the following information:
1. Full name, passport number and country of issue.
2. Full mailing address and a fax number to send the letter.
3. Names and passport numbers of your accompanying persons, if any.
Please, be sure to provide your name and the names of your accompanying persons exactly as written in the passports.