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DISCLAIMER: The information presented on this website is believed to be accurate as of the time of posting; however, it is the responsibility of the website user/visitor to confirm all information by visiting the official website of the United States Department of State at

Colorado School of Mines offers this website as a source of general information only. By using/visiting this website, users/visitors agree and affirm that Colorado School of Mines shall not be held responsible, accountable, or liable for any errors or omissions in the information presented herein or on any website that may be accessed through a link provided on this website.

General information

From the website of the United States Department of State:A citizen of a foreign country who seeks to enter the United States generally must first obtain a U.S. visa, which is placed in the traveler’s passport, a travel document issued by the traveler’s country of citizenship.

Certain international travelers may be eligible to travel to the United States without a visa if they meet the requirements for visa-free travel.

A resource that should be helpful to those persons seeking a visa for travel to the United States can be found on the Department of State’s website at At this location, travelers can find a “Visa Wizard” that can be useful in determining the type of visa required, a listing of frequently asked questions, estimates of visa appointment waiting times, and much more visa-related information.

Invitation letter

From the website of the United States Department of State:A letter of invitation or Affidavit of Support is not needed to apply for a visitor visa. If you choose to bring a letter of invitation or Affidavit of Support to your interview, please remember it is not one of the factors used in determining whether to issue or deny the visa.

Although a letter of invitation is not required, some visa applicants may wish to acquire this additional document. Generally, the purpose of the letter would be to show the United States consular officer who considers the visa application that the applicant has a specific plan regarding visiting (and eventually leaving) the United States and has a legitimate purpose for the visit.

Persons planning to attend an event at or affiliated with Colorado School of Mines can request a letter of invitation through this website.

If you do not already have your passport, acquiring an invitation letter will be of little use, since the embassy or consulate at which you request your visa will likely not consider your application without your valid passport information. Nevertheless, you can use this website to request a letter even if you do not have a passport.

Invitation letter request

If you plan to become a registered event attendee, then your request for an invitation letter must be considered by Colorado School of Mines before issuance. The information you submit with your request may be sufficient; however, it may be necessary for Colorado School of Mines to contact you by email in the event that additional information is required.

The process of reviewing and considering your request may require a week or more to complete; therefore, you should begin the process as soon as you have decided you want to attend an event. If you have not heard from us within two weeks of the submission of your request, please use the contact information available on this website to inquire about the status of the request.

If your request is granted, your invitation letter will be sent to you as a Portable Document Format (PDF) file attached to an email sent to the address you provide in your request. To begin the process, click/tap the button below.