* If you are giving a presentation, you can download an invitation letter from a link in your acceptance notification email.
* If you are NOT PRESENTING, you MUST REGISTER for the meeting first, and then request an invitation letter by emailing ESA REGISTRAR.
If you need to have specific information (e.g. Passport No, Date of Birth, etc.) added to your letter of invitation, please indicate this request in your email.
Important information regarding Visa Invitation Letters (please read):
- Your name must be listed exactly as it appears on your passport. Any differences between the name on your passport and the name on your invitation letter or other documentation could lead to a delay and/or denial of your visa.
- ESA reserves the right to request further information regarding the company or affiliation of the attendee to ensure the validity of requests.
- ESA is unable to contact U.S. Embassies in support of an individual attempting to gain entry to attend a meeting.
Apply now for your Visa
The visa application process to enter the United States has become subject to greater degrees of scrutiny than in the past. For this reason, the application process can take up to six months or more. You will need to apply for your visa as early as possible, but no later than three months before you wish to enter the United States.
Generally, a citizen of a foreign country who wishes to enter the United States must first obtain a visa, either a nonimmigrant visa for temporary stay, or an immigrant visa for permanent residence. Visitor visas are nonimmigrant visas for persons who want to enter the United States temporarily for business (visa category B-1), tourism, pleasure or visiting (visa category B-2), or a combination of both purposes (B-1/B-2).
There are several steps to apply for a visa. The order of these steps and how you complete them may vary at the U.S. Embassy or Consulate where you apply. Please consult the instructions available on the U.S. Embassy or Consulate website where you will apply.
Visa Waiver Program
There are 39 countries that participate in the Visa Waiver Program. If your country is on this list, and you are traveling to the United States for tourism or business for 90 days or less with a valid passport that meets U.S. requirements, and the listed conditions do not apply to you, you do NOT need a visa. Otherwise, you need to obtain a visa.
Electronic System for Travel Authorization (ESTA)
ESTA is an automated system that determines the eligibility of visitors to travel to the United States under the Visa Waiver Program (VWP). Authorization via ESTA does not determine whether a traveler is admissible to the United States. U.S. Customs and Border Protection officers determine admissibility upon travelers’ arrival. The ESTA application collections biographic information and answers to VWP eligibility questions. ESTA applications may be submitted at any time prior to travel, though it is recommended that travelers apply as soon as they begin preparing travel plans or prior to purchasing airline tickets.
Travelers in the following categories are no longer eligible to travel or be admitted to the United States under the Visa Waiver Program (VWP): Nationals of VWP countries who have traveled to or been present in Iran, Iraq, North Korea, Sudan, Syria, Libya, Somalia and Yemen on or after March 1, 2011 (with limited exceptions for travel for diplomatic or military purposes in the service of a VWP country). Nationals of VWP countries who are also nationals of Iran, Iraq, North Korea, Sudan, or Syria.
The Act includes other changes to the VWP to promote enhanced information sharing of terrorism and criminal data, and use of INTERPOL databases and notices for border screening purposes. The vast majority of VWP eligible travelers will not be affected by the legislation.
Complete the Online Visa Application
- You must have an e-passport to use the VWP. An e-Passport is an enhanced secure passport with an embedded electronic chip. You can readily identify an e-Passport, because it has a unique international symbol on the cover.
- Complete the online visa application,
- Print the application form confirmation page to bring to your interview.
- Photo – You will upload your photo while completing the online Form DS-160. Your photo must be in the format explained in the Photograph Requirements.
Access the online DS-160 by clicking: Consular Electronic Application Center website.
Important Notice to Visa Applicants: After you have completed the DS-160, you must take these next steps below:
- Print and keep the DS-160 barcode page. (You will not need to print the full application.)
- You must schedule a visa interview appointment. (The U.S. Embassy or Consulate does not schedule an appointment for you.) Visit the U.S. Embassy or Consulate website where you will be interviewed for country-specific instructions
- Pay the visa application processing fee. Review country-specific instructions on the U.S. Embassy or Consulate website.
Note: Visa applicants must qualify on the basis of the applicant’s residence and ties abroad, rather than assurances from U.S. family and friends. A letter of invitation or Affidavit of Support is not needed to apply for a nonimmigrant tourist visa. If you do choose to bring a letter of invitation or Affidavit of Support to your interview, please remember that it is not one of the factors that we use in determining whether to issue or deny a nonimmigrant tourist visa.
Whether you are applying for the first time or renewing your visa, you will use the same application process. Some applicants seeking to renew their visas in certain visa classes may be eligible for the Interview Waiver Program (IWP) which allows qualified individuals to apply for visa renewals without being interviewed in person by a U.S. consular officer. Review the instructions on the website of the U.S. Embassy or Consulate where you will apply to determine if the IWP is available and if you qualify.
- S. Customs and Border Information
- S. State Department Visa Information
- Department of Homeland Security
- National Academies International Visitors Office
ESA is not able to contact U.S. embassies in support of an individual attempting to gain entry into the host country to attend the conference.
If your visa is delayed or denied, please contact the consulate where your application is being processed. Review Visa Denials for detailed information about visa ineligibility, denials and waivers.