Very unusual for once a year. I am retired and have a monthly pay direct deposit to Thailand. I do all NY banking here and never had a problem here, I did have a problem with retirement pay and the nice lady at the bank who is in charge of retirement accounts caught the error and we had them fix it. She saved me from losing nearly
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million Baht. Thailand is a good place to live. Thailand is my home after I retired. Enjoy
If you are retiring in Thailand WHY do you want to have your money in a UK bank. Every time you need money you will pay the transfer fee and that adds up fast. The Baht 800K needs to be here in Thailand. Put it in an account and do not ever let that account get less than the 800K.
I have three accounts with Bangkok Bank, and they never asked me questions, and there was no charge to open them. Did you go to a bank or an agent? The 80K Baht you mentioned may be the required account to get a Visa. That would be 800K if you want a retirement visa.
Stop asking questions here and go to immigration for visa needs, I suggest to the office in Bangkok. For bank I went to Bangkok Bank on Selom Rd Bkk and then got all the info they asked for and had no problem. If you need the B800,000 and do not have that then you can't afford to get retirement so go for a different one.
I flew to Thailand on Thanksgiving day some years ago. cost less and the best part there was many empty seats so I could stretch out across the middle section of seats. I also got extra meals and 2 colas free. Fly on Christmas day if you can.