Polite Subject Line: Use a clear and respectful subject line, such as "Follow-Up: Request for Meeting. We have provided a sample invitation letter for inviting relatives and friends above.You may fill out the highlighted sections using your own information. Additionally, we expect that you will be involved in activities that will allow for cultural exchange among faculty, staff, students and the Houston community. Learn to craft meeting invitation emails that can't be ignored. Get practical tips, templates and a step-by-step guide to writing invites that get results. To obtain an Official Letter of Invitation for your visa process, please complete the form below. Invitation Letter Process: To obtain an invitation letter from the organizers, you'll need to complete your event registration. For a formal letter invitation, it's best to explicitly point out the purpose, event goals, and the value it can bring to participants. If you require a letter of invitation for your visa application, please submit a request for a letter of invitation.