Can I renew a Non-O-A visa in Thailand every year indefinitely?

@John *********

yes but they have not left UK, hence I asked if can get it there

@Graham *****

Right. I did not check his country before. I don't know if UK allows asking a NON imm. OA multiple times (every 2 year I meen) 🤷‍♂️

@Brian ********

no, the OA can be extended inside Thailand for another year exactly like Graham explained, and it is the same method as a type O extension, with the insurance requirement added. To switch to a type O you must exit the country when the OA expires, and start all over getting the type O 90 day entry stamp first then the one year extension. You can extend the OA inside Thailand, but it is no longer multi-entry unless you also buy the multi-entry re-entry permit, and it is only valid for the one year extension. You can not leave before it expires and return getting another one year stamp. It no longer works that way when extended inside Thailand

@Brian ********

Don't think so concerning the last bit. After that second year (need a re-entry permit if you want to leave and come back) you can ask for a year extension (with health insurance of the whole period of that year extension). So the only difference between a year extension based on NON imm. OA and NON imm O is that health insurance requirement.