Hello, I am French 53, living in Greece. I bought an appartement in Bangkok 7 years ago. Normally I travel 2 times a year to Thailand, total of 4 months using visa exemption and tourist visa. I would like to ask you and to avoid any problems at immigration at the arrival if the non immigrant O visa will be better for me. Then I can change it for retirement visa O-A in Bangkok. Because the Thai consulate in Greece doesn't give the O-A, only non immigrant O single entry. Thank you for your advice.