International Attendee Registration Visa Information

International registrants will automatically receive a letter of invitation at the time of registration.

We strongly recommend international attendees review the APS visa information before registering for the annual meeting. To avoid visa-related problems, review the Visa Delays page. For additional information, review the Entering the United States page.

If you need a letter before you register, please send an email to Please include LETTER OF INVITATION in the subject, along with the following information.

  • Your name as it appears on your passport
  • Your affiliation and mailing address
  • Your submitted abstract title

Allow 5-7 business days to receive your letter of invitation for a visa application.