one cannot get a 30 days extension on a 90-days Non-Imm-O visa. The only way to obtain 30 more days of stay permit, is to leave Thailand before the 90 days are up and re-enter visa-exempt
the TM30 is the registration of you in any accommodation, must be done by the hotel or the landlord within 24 hours of your arrival at the accommodation . . . . . .in case you were not asked for the receipt, you can call yourself double lucky!
Immigration generously granted an extension despite the overstay: they issued a 30 days touristic extension for 1900.- THB, however minus ONE day. And the 500.- THB overstay fine came on top of it . . . He's the lucky winner, now he is good until March 2nd
well you would have to spent the 1900.- THB on top of the 500.- THB by any means. On Immigration they might insist you take the 30 minus 1 -days extension OR the "application denied you have 7 days to leave the kingdom" stamp. Both will cost a 1900.- THB fee
you could visit Immigration and try to obtain the 30-days touristic extension you are eligible ONCE, with a visa-exempt entry. For the 1900.- THB fee, they might be willing to issue the extension minus one day. However I cannot guarantee this. They might also propose you leave the country ASAP and pay the overstay fine at the airport.
well, if you enter Thailand with a tourist visa and want to apply for the "change of visa type" to a 90-days Non-imm-O Retirement visa on Immigration, you will need a minimum of 800,000.- THB in a Thai bank account in your sole name on the day of your application. The money must just sit there, and you must show a proof that it came from abroad, and seasoning is not required at this point. You will then receive the 90-days Non-Imm-O visa (it will15 days "under consideration" first). Now after 60 days have passed, or from up 30 days before the 90 days will expire, and the money has seasoned in the account for two months, you will need the "bank letter of guarantee" (rab roong thanakan) confirming the seasoning period. You must then apply for the "1-year Extension of Stay Permit". After having issued the extension, a minimum of 800K must remain in the account for three months, some Immigrations will ask you to come back after three months showing an updated bankbook. For the rest of the year the funds should never fall below 400,000.- THB. And two months before you need to apply for the next "1-year Extension of Stay", the funds must again be over 800,000.- THB . . . . . . . . .NOTE: this is NOT valid for the Immigration Pattaya, because THEY require a two months seasoning not only for the application to the "extension", but already for the "change" from the tourist visa to the 90-days Non-Imm-O visa
I don't recommend doing the "change" from a 30 days visa exempt to a "90 days Non-Imm-O retirement visa" in Pattaya, because they ask for a two-months seasoning of the 800,000.- THB, already on the day of the application for the visa. Which in most cases is NOT doable if the applicant has to open a bank account first