Hungary is part of the Schengen Area.

Citizens of the European Union do not need a visa to enter Hungary.

Citizens of other countries may enter Hungary only with a valid entry visa. For further information please visit the website of the Hungarian Consular Service.

If you require for the visa an invitation letter from the organisers to attend OTST 2021 please e-mail to: This email address is being protected from spambots. You need JavaScript enabled to view it.

Please include the following information in your e-mail message: 

Full name (including title)

  • E-mail address
  • Company / Affiliation
  • Full postal address
  • Contact telephone number
  • Registration booking reference (if applicable)
  • Any specific details which must be stipulated in the letter (if applicable)




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