Do you work or study in a sensitive scientific or technical field? If so, your visa may be subject to additional processing.
The processing, on average, takes approximately four weeks to complete. Per U.S. visa laws and regulations the validity of your visa may also be limited, depending upon the visa category.
Want to help us process your case faster? Come to your interview prepared!
Applicants who present detailed information at the interview can help us begin processing those cases right away. Otherwise, we have to wait until the necessary information is submitted—additional processing cannot begin until we receive that information. Non-refundable flight reservations or other travel plans should not be finalized until after you have received your visa. This process cannot be expedited.
Information that the consular officer will need varies, and we suggest applicants come prepared to present the following information, in writing, at the interview:
- A detailed description of your current business, research or study program interests.
- Information about your current position and location of current work (including address and phone number).
- Complete CV/resume.
- International travel history for the past 10 years (names of countries and years visited).
- Travel itinerary for current trip.
- Letter of invitation, including the address, website, and contact information of the company and/or institution that you intend to visit in the United States.
- The point of contact at the company and/or institution.
- Details about the business, research or studies you plan to conduct in the United States.
- Details about the source of funding for the trip.
- Location and manner in which you will use the goods or knowledge acquired in the United States.
- List of your publications, if any.
- Letter of invitation from U.S. sponsor (if applicable).
- Details about the conference you plan to attend.
- Conference registration confirmation (if available)
- Export license numbers covering the activity, if relevant.


