Comprehensive guide to writing an invitation letter for your US visa application, with free samples and tips. The letter should include specific details like your relationship with the visitor, the purpose of their visit, duration of stay, and financial arrangements.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. Follow a few simple steps to create a variety of invitation letters for your church using our free templates. For an invite letter, your name as in passport, passport number and issuing country can be mentioned. This article shows how you can make an invitation letter for US travel visa in 5 minutes using FlightGen App. Complete the Invitation Letter form. Fill out the form with correct and sincere information about you, your guest, and the entry and departure date. The template is designed in both A4 and US letter sizes, accommodating international and domestic visa requirements.