Passport & Visa/Others
In general, any foreign visitor to enter Germany should have a valid passport and might need a visa. You can find the table of countries for which a visa application is requested under the following link: http://www.auswaertiges-amt.de/EN/EinreiseUndAufenthalt/StaatenlisteVisumpflicht_node.html
On the same page you will find the application forms in different languages (see right column).
Please request your invitation letter for visa application by direct email contact under the subject VISA and include your correct mailing address for the invitation in paper form: