asking for friend ... entered by air without visa, 30 days visa excemption, now overstayed for 1 day ... can he go to immigration, pay fine and extend for another 30 days or with overstay is a problem? Thank you
TLDR : Answer Summary
A friend entered Thailand without a visa under the 30-day visa exemption and has overstayed by one day. Community members confirmed that he can visit the immigration office to pay a fine, which may be waived due to the weekend office closures, and apply for a 30-day extension of stay. The extension will be backdated to the original expiration date, but he will receive an overstay stamp in his passport.