Unfortunately, immigration offices tend to make up their own set of rules as they go along. Best to abide by what they say, and the process will normaljy be smooth, I said normally. I always provide a little coffee money. Never any issues in 10 years. Best of luck.
Ron Cooper. Are you by chance a vet? I use NFCU. Have lived here 9 years. They charge $25 for any amount. Transfer directly to Bangkok Bank. Exchange rate always great. If commercial rate is 36.54 I will get 36.47. Money gets here within 2 business days.