Letter of Invitation

Individuals requiring an official Letter of Invitation can request one through the link below.


The Letter of Invitation does not financially obligate the Congress organizers in any way. All expenses incurred in relation to the Congress are the sole responsibility of the attendee.

Visa Requirements

Visa requirements vary for different nationalities so check with your local American embassy or consulate before you travel. Always check what form of ID is required by your individual airline, ferry company or travel agent before travelling.


It is the sole responsibility of the attendee to take care of his / her visa requirements. Attendees who require an entry visa must allow sufficient time for the application procedure. Attendees should contact the nearest embassy or consulate to determine the appropriate timing of their visa applications.

Your passport must be valid up to the return date of your trip to the United States.

You are not sure whether you need a visa?

Check here for information

Arriving in Chicago

When you arrive in the United States, holders of American visas will be required to pass through an immigration check who will check the reason for travel, grant or refuse entry to the State and specify the duration of stay permitted, which will be evidenced by a stamp in the traveller’s passport.

Please ensure you have your invitation letter, proof of accommodation and other supporting documents to hand to show to the immigration officer on arrival in Ireland.