A visa is required to enter the United States for many nationalities. Please check with your local U.S. embassy/consulate whether this applies to you. In case a visa is required, please apply as soon as possible, as obtaining the visa may take several weeks.
The United States Department of State provides a list of countries that are participants in the Visa Waiver Program.
To request an invitation letter, you need first register for the conference. Then forward the registration confirmation email, along with the following information (will be shown in your letter) to email@example.com:
Detailed Mailing Address:
Date of Birth:
In case that you are the (co-) author of an accepted paper, please provide the title information of your paper.
If you have additional questions please contact firstname.lastname@example.org.