First, always use the complete, formal name of your guest. How to write a letter inviting my brother who lives in Haiti to attend my wedding in the US?Ans: Here is a sample letter: Dear Rohan, I hope this letter finds you well. I am thrilled to share the joyous news that my brother is getting married! It gives me immense pleasure to cordially Invite you and your family on the auspicious occasion of my brother's marriage. 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. What do you want to tell him? Are you asking him to perform your wedding? All words should be spelled out on invitations, enclosure cards, and envelopes, no matter how informal your wedding is.