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.We would like to invite you to an organizational meeting on (insert date, time, place). In this guide on how to write invitation emails, we break down the writing process into simple steps. If you need a letter of invitation to the conference, please fill out the form below. Letter of Invitations Request Form. Although not a requirement, your U.S. host can write a letter. We've provided a sample invitation letter for a B-2 visitor visa. Clearly state what you are inviting the recipient to do and why it is important. If you are interest in the Texas Libertarian Party would please fill out and return this questionnaire?