International Attendees

Attendees from across the globe visit our National Meetings each year. Let us help you plan your international travels!

Obtain a Visa Letter

  • Meeting Presenters: Download a personalized letter.
    - To download a personalized visa letter, log into MAPS using your ACS ID.
  • Meeting Attendees Who Are Not Presenters: Access a general visa letter from you meeting registration confirmation.
    - If you require a personalized letter, please contact:

    Convention Data Services
    Phone: 1-800-251-8629 or 1-508-7430192

    Brenda Philpot, American Chemical Society
    Phone: 202-872-6111 or

ACS has members worldwide, many of whom travel to the United States for work, collaboration, or meetings. Find information on obtaining a U.S. visa, the visa waiver program for travelers from selected countries, and more.

Preparing to Attend an ACS Meeting

After you complete the visa application process use the resources for each national meeting to register, plan your travel, reserve your hotel room, and obtain scheduling details. To save money and assure you receive proper accommodations, we strongly recommend that you complete your hotel reservations and register for the meeting through ACS before the deadlines.

All attendees, including speakers and poster presenters, must register for the meeting in order to participate in the technical sessions or the exposition. Attendees must display their badge at all times to be admitted to all official ACS sessions and events.