Letter from Thai Bank certified money in thai account (Alien’s Name) more than 400,000 Baht 2 months before, bank book and ATM slip on date of application
OR
Income or Pension have to certified by The Embassy or Consulate in Thailand and Show income more than 40,000 Baht/month
I got my Mrs a USA visa but it was hard … one on one interview . You need to show that her work has given her leave for the time and that she has funds . If her english is poor , then no need to apply . They approve very few