Hire an immigration attorney to help your brother in his tourist visa application. How can you write a letter to your class teacher for a 3-day leave for your brother's wedding?Sample leave application for brother's wedding. Have him apply for a B2 visa at his US consulate. Give him an invitation letter and affidavit of support I-134 and wedding invitation. You have always inspired us to start new lives. With you, our brother's wedding ceremony is complete. To help you extend invitations, we have samples on how to write a letter to your friend to invite to your brother's wedding for you. If you are inviting family members to attend your graduation ceremony, you can also request a special letter of invitation from the University of Michigan. Unsure of the best wedding invitation wording?