Travel/International Attendee Information

The U.S. Department of State provides information on traveling to the United States regarding passports, international travel, etc.  Information can be found at

International Attendees - Invitation Letter Request Instructions: ·        

Please send your name, address and e-mail address to Terry Canchola at

After sending the requested information, your invitation letter will be prepared and sent by e-mail to the e-mail address you provided.  The letter is typically sent electronically within one week. Letters may be faxed if requested.  Please provide a fax number and indicate that you would like the letter faxed in addition to the e-mailed copy.

Letters cannot be sent to the Embassy or U.S. Consulate. ADSC cannot intervene on behalf of an invitee with the Embassy or U.S. Consulate via fax, phone, surface mail, or e-mail.  ADSC encourages you to process any required visa documents at least 6 months in advance of the conference date. Please remember that the U.S. Department of State now requires you to appear for a personal interview in order to apply for a visa and requires that you have a machine-readable passport. Some consulates have up to a four-month waiting period for an interview, so please contact your nearest consulate as soon as possible to request an interview date.  

Information on applying for a visa can be found here:

Please note a new process for some who travel to the US. All travelers from countries that have a Visa Waiver Program with the US are required to obtain approval through the Electronic System for Travel Authorization (ESTA). The new system is designed to ease travel for those from the visa waiver countries.  This web-based system takes only a few minutes to complete.  Unlike passport checks, the airlines will not be verifying ESTA registration prior to boarding, so please make sure you have obtained approval before embarking on your journey to avoid being refused entry. To ascertain if you fall within the Visa Waiver Category, please follow the link to the ESTA registration site and complete the application online: