Travel Visas and requests for Letters of Invitation
We suggest that you apply for your visa at least two months in advance due to security-related policies that have greatly increased the processing time for visa applications.
U.S. consular officers now interview most applicants as part of the application process. This can add additional time and delays. Currently there is a mandatory security check period of 30 days for people whose passports are issued from several countries, including China, North Korea, and most middle-eastern countries. Furthermore, the U.S. State Department requires citizens of many countries to obtain visas to attend any scientific program.
As of October 26, 2004, visa waiver travelers from ALL 27 Visa Waiver Program (VWP) countries must present either a machine-readable passport or a U.S. visa.
To learn more about the Visa Waiver Program and machine readable passports, go to:
http://travel.state.gov/visa/temp/without/without_1990.html.
For general information about visas, go to:
http://www7.nationalacademies.org/visas.
Letters of Invitation
Visa applications may require an invitation letter from the conference organizers. To request an invitation letter, email membership@ion.org. Please specify if you are a conference author or speaker. Invitation letters will be sent in PDF format by reply email, unless you request a hardcopy by mail.