if you look like the people at the right, don't worry. However if you show up like the people at the left, you shoud be prepared to be asked for 700 U.S. Dollar in cash
NO! You cannot apply for a 365-days Non-Imm-O/A visa inside Thailand. You can only apply for it in your home country i.e. the country of your residence . . That's why I wrote the posted text sucks because it is misleading readers (it is not an official text!)
why are you telling me this, I know the "change of visa type" process since many many years and actually recommend it to many people in my visa advice group . . . . . And then came the new banking rules by February this year - the change in bank policies towards people who arrived on tourist visas. This change left a big dent in the processing, because from then on the "change of visa type" would only be possible if you already had a Thai bank account. CATCH22 . .
the text WRONGLY says "apply in Thailand", and then it continues to list the requirements for a Non-O/A visa. This f....g text implies that you can apply for a Non-O/A visa inside Thailand. This is NOT possible. We need to IGNORE this stupid text the OP posted
Mark Grigg . . this INOFFICIAL text you posted is complete and utter bollocks. . . . . You cannot apply for a Non-O/A visa inside Thailand . . . Anyways you turn and twist it: You picked the wrong visa on this shitty list. . . . THROW IT AWAY! First of all, you should apply for the Non-Imm-O retirement/over 50 visa through the E-Visa online system of the Royal Thai Embassy London, and not for the Non-Imm-O/A visa!