I forgot my Non O visa stamp had expired since 16 August. My actual visa lasts until October I am due to fly out this evening. So, I checked with the ministry and afaict I just have to pay 500 baht per day and don't suffer any other penalty. Is this correct? Can anyone give me any advice about what I should say, if anything, at the airport? I just forgot, I never stay anywhere near 3 months until this time. Will this give me a problem when I apply for a new Non O or come in on a visa exempt stamp in the future (I am a UK citizen).