It's very suitable for retirees who are regular travellers. For those who just want to sit back and stay in Thailand forever perhaps not, but for me it's ideal. I'll be switching from non-O to DTV early next year
Correct. I've had (and still have) accounts with Bangkok Bank and SCB and they always wanted to see my lease (which proves I'm a bona-fide resident) and my passport. That's all. Never asked for certificate of residency, which as you say, doesn't really prove anything
