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Visa Information

For International Attendees

Do You Need a Visa or ESTA?

International visitors to the United States may need either a visa or ESTA authorization depending on their country of citizenship. The United States has two main entry programs:

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  • Visa Waiver Program (VWP) / ESTA: Citizens of 40+ participating countries can apply for an Electronic System for Travel Authorization (ESTA) for conference attendance. This allows stays up to 90 days for business purposes.
     

  • B-1/B-2 Visitor Visa: Citizens of non-VWP countries must apply for a visitor visa through a U.S. Embassy or Consulate.

 

Exceptions: Canadian citizens do not need a visa or ESTA for business visits. Mexican citizens may need a visa depending on specific circumstances.

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All travelers must present acceptable travel documents at the U.S. border. We strongly suggest that you begin the application process as soon as possible to avoid delays.

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It is the sole responsibility of the participant to obtain a visa or ESTA authorization. You can request an invitation letter during the registration process.

Find Out What You Need

  • Check if your country participates in the Visa Waiver Program

  • Determine if you need a B-1 business visitor visa

  • Review specific requirements for your nationality
     

Please check with the U.S. Embassy or Consulate in your country for specific requirements.

How to Get an Invitation Letter for Your Visa Application

For all travelers needing a visa to enter the United States, the organizing committee will provide an invitation letter upon request. To receive your invitation letter:
 

  1. Complete your conference registration

  2. Get in touch with the committee via info@netsci2026.com
     

After receiving full payment of your registration, we will send you the official invitation letter.

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Important notes about the invitation letter:

  • This letter will not automatically grant you a visa

  • This letter helps facilitate the application process but does not guarantee approval

  • Your application will undergo the same scrutiny as any visa application

  • If your work or research is not directly related to the conference subject, your visa may be denied

  • The organizers will not provide financial support for visa applications or travel

Processing Times

  • ESTA Applications: Usually processed within 72 hours, but we recommend applying at least 2 weeks before travel.

  • B-1/B-2 Visa Applications: Processing times vary significantly by country and can range from 2 weeks to 4 months. Check current wait times at your local U.S. Embassy or Consulate.

 

Important: Schedule your visa interview as early as possible. Interview wait times can be several weeks or months depending on your location.

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As soon as you receive your visa interview confirmation or ESTA approval number, please email it to us at info@netsci2026.com. This will help us maintain an accurate attendee list and assist with any necessary verification.

Useful Links
Contact Information

For general conference inquiries, email info@netsci2026.com.

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Please note: Conference organizers cannot influence visa decisions or expedite processing times. We can only provide invitation letters and registration confirmations to support your application.

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