Please inquire early about Visa requirements to visit the United States from your local US Embassy or Consulate. For general information on the USA Visa requirements, go to: http://travel.state.gov/content/visas/english.html.
If you require a letter of invitation, please fill out the invitation request form below. In order for your request to be processed, you are required to register for the conference first . Note that it may take up to 7 days to process your request for a special invitation letter. The signed letter (in PDF) will be sent to you by email.
To avoid uncertainty, participants are advised to apply for a Visa as early as possible. It is recommended that you apply for a visa at least 2 months in advance.
For more information regarding the requirements and procedure for obtaining a Visa to the USA, please visit: http://travel.state.gov/content/visas/english.html.