Hello, I am actually under a visa non-immigrant O (maried to thai national) that end the 28 september. I will have 50yo the 01 october and want to change my visa to a non-immigrant OA. I am french so I will have a proof of income from my embassy. I went to the immigration in Chiang Mai and they gave me a list of all the required documents. I plan to go to Vientiane, Laos and stay there a week at the end of my visa. What papers I will need to ask a new non-immigrant O before returning in Thailand ? I know I will need to make an appointment online. Thanks.