Visa Information

Visa Information

Letter of Invitation

If you would like to receive a Letter of Invitation to assist in your visitor visa application process, please use the Visa Generator. If you have questions, please contact the SITC office at +1 414 271 2456 or email Events@sitcancer.org.

Visa Procedures

For those individuals who need to secure a visitor visa (B-1), the following links are helpful:


Visa Waiver Program (VWP)

The Visa Waiver Program (VWP) allows citizens of specific countries to travel to the United States for tourism or business, for 90 days or less, without obtaining a nonimmigrant visa. For a list of participating countries and additional information about the program visit the U.S. Department of State's Visa Waiver Program website

Electronic System for Travel Authorization

The Electronic System for Travel Authorization (ESTA) is an automated system that assists in determining eligibility to travel to the United States under the VWP. ESTA is not a visa. VWP travelers must complete an ESTA application and receive notification of his or her acceptance prior to their visit. Obtain an ESTA now.

Machine-Readable Passports

All VWP travelers, regardless of age or type of passport used, must present a machine-readable passport. In addition, depending on when VWP travelers' passports were issued, other passport requirements may apply. 

Residents of Canada, Mexico and Bermuda

Canada, Mexico and Bermuda are not participants in the Visa Waiver Program. The Western Hemisphere Travel Initiative (WHTI) requires all travelers to and from the Americas, the Caribbean and Bermuda to have a passport or other accepted document that establishes the bearer's identity and nationality to enter or re-enter the United States. Visit the Department of Homeland Security's Crossing Boarders website for more information about proper documentation.