Visa Information

International participants arriving from outside the United States with passports from 36 countries in the Visa Waiver Program (VWP) who have machine-readable passports may be able to travel without a visa. However, a valid Electronic System for Travel Authorization (ESTA) approval is required for all participants in VWP to travel to the United States. ESTA is a free, automated system used to determine the eligibility of visitors to travel to the United States under the VWP. Participants from other countries will need a B-1 (business) visa or B-2 (tourist) visa.

Note: Obtaining U.S. visas may require a visit to a U.S. consulate or embassy, payment of a fee, and significant wait time. Please contact the local U.S. consulate or embassy for the up to date information.

Letter of invitation

Individuals requiring an official letter of invitation in order to attend the conference may email Vickie Stephens at

This may be needed to obtain a visa or permission to attend the meeting, and is unrelated to any assistance.

Please include your:

The letter will be provided as a read-only email attachment.

Note: a letter of invitation is typically provided only after the individual has registered and paid to attend the conference.