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Visa Procedures

If you require an invitation letter to attend the congress, please contact
Visas to the United States (U.S.) can take a while to process, so get ahead before the congress.
  • The first step is to submit an online U.S. Visa Application.
    • Please contact your local U.S. consulate to allow as much time as possible for processing.
  • Visa applicants from 38 countries may be eligible for the Visa Waiver Program / Electronic System for Travel Authorization (ESTA) Program.
  • Visa applicants from Iran, Libya, North Korea, Somalia, Syria, Venezuela or Yemen may experience enhanced screenings.
    • Visa applicants (of any nationality) who have traveled to these countries may not be eligible for the ESTA program.
    • If an ESTA application is rejected, the applicant should apply for a standard U.S. visa
The ADA has partnered with Travisa/CIBT to guide visitors through the visa process. Travisa/CIBT has worldwide office located in Europe, Latin America, Asia and Australia to assist with U.S. visas, with regional offices in Houston (USA), London (UK) and Singapore.