I am new here and wanted to check if anybody has any experience or knowledge about my situation. I have a visa dropbox appointment in March and I added my wife (H4) as a family member in the application. For some reason, she will not be able to travel to India in March. Is it possible to change / reschedule only her appointment for a later date while I can still drop mine in March. She might be able to travel sometime later in the year around July. What happens if I only show up there with my application - can her visa fee be reused after that?