Begin the letter with an official header that includes the student's full name and address. Learn how to write a professional acceptance letter with our stepbystep guide.Header: Your name, address, date, and recipient's name and address. The purpose of this letter is to invite you and your organization,. , as a public service, to our (name of career fair expo) from ____________a.m. Many VISA issuing offices require that you present a letter of invitation to the conference, proof of conference registration, and airline ticket confirmation. Has anyone's child been selected to apply for University of Texas's Forty Acres scholarship?