International Visitors

Official Letters of Invitation

If you are an eligible citizen from one of the 40 countries a part of the Visa Waiver Program (VWP), you can enter the United States for business or tourism for 90 days or less without needing a visa. Find out here if you aren’t sure if your country is included in the VWP.

Reminder: Invitation letters are not required for the U.S. visa application. Make sure to print your registration confirmation to validate that you are registered. Providing hotel and airline reservation proof will also help authenticate your U.S. visa application.

If you do require a VISA

  • Please make your visa appointment as soon as possible, the U.S. Department of State is experiencing delays scheduling these appointments in several countries. You can check your country visa appointment wait times here.
  • To receive your Letter of Invitation, you must first register and pay the registration fee.
  • Letter of Invitation will be emailed free of charge after your registration is paid. However, if you require a mailed copy, there will be a USD 50 non-refundable administrative fee per registrant.
  • Complete the online visa application form and view full visa information to help answer any questions you may have.

Visa letters can ONLY be requested through registration.


Apply Early! We encourage all attendees to start the visa application process at least 60-90 days before their travel date. Contact your local Embassy’s Consular Section. To determine the typical interview scheduling wait times.

Ties to your country: You will need to prove that you have strong ties to your country of residence. Samples of proof include, but are not limited to, proof of employment, business ownership, and/or property ownership.

Proof of Previous International Travel. While not necessary, it is helpful to prove that you had traveled internationally before and followed the timing restrictions of your visa.c 


You will need the following documents for your interview:

  •  Valid passport
  •  Necessary visa application forms
  •  Proof of Visa fee payment
  •  Documents showing employment and financial status and the reason for your travel
  •  Proof of previous visits to the United States (if applicable)
  •  Any additional documents your local embassy or consulate require