Find out if you're eligible 2. I am writing to confirm my acceptance of your employment offer on April 20 and to tell you how delighted I am to be joining XYZ Corporation in Chicago.Travel signatures, also called 'travel endorsements', are OIA adviser signatures that can be found on your I-20 (page 2) or DS-2019. An appointment is required. The automated appointment number is 1877-487-2778. Simply fill out the form below to request your free copy of the latest Chicago Visitors Guide. Learn how to respond from the sample letter on this page. Information Request Letter Sample. They will first receive a congratulatory email, then an acceptance packet in the mail containing an acceptance letter and agreement forms. Upon return to Chicago.