Comprehensive guide to writing an invitation letter for your US visa application, with free samples and tips. What should the letter say?The letter should include specific details like your relationship with the visitor, the purpose of their visit, duration of stay, and financial arrangements. This template is readily available for download in MS Word, Google Docs, and Apple Pages formats, ensuring compatibility with various word processing software. Follow a few simple steps to create a variety of invitation letters for your church using our free templates.