1. Your invitation letter explains your status in the US, what you are doing, and whom you are inviting. Students who are graduating from UC Riverside and need a Commencement invitation letter for visiting family members from overseas should follow the steps below.A letter of invitation or Affidavit of Support is not needed to apply for a visitor visa. Please note, UC Riverside does not provide invitation letters for visas. An invitation is not required and cannot guarantee visa issuance. A letter of invitation is an additional document that can be provided when submitting your B-2 Visitor Visa to travel to the United States for tourism purposes. While the US resident can write an invitation letter, the visa officer will never use it to evaluate the applicant's eligibility for a visa. To obtain a visa invitation letter for Display Week 2025, please fill out the form below. The visa invitation letter is free, but email form only. I would like to invite you to come visit me in the United States this summer.