Visa Information

Please read this travel information if you are an international participant arriving from outside the United States.

Note: Obtaining U.S. visas may require a visit to a U.S. consulate or embassy, payment of a fee, and significant wait time. Please contact your local U.S. consulate or embassy for the most up-to-date information.

Letter of Invitation

If you require an official letter of invitation in order to attend the 92nd ACS Colloid & Surface Science Symposium, send an email to to make the request.

Important note: A letter of invitation is provided only after you have completed your registration and payment for the 92nd ACS Colloid & Surface Science Symposium. Please include the following in your request: your name, professional title, institution, business address, and email address. The letter of invitation will be provided by email after your registration has been confirmed.