Hi, just to confirm. My friends, UK citizens, entered Thailand and got a visa exempt for 30 days and they would like to extend their stay. As far as I have searched, for the visa extension process, one would need - photo, passport front page, visa stamp page (both original and copy), TM 30 and forms at the immigration office. Are there any more documents they need for the extension? Thank you!
TLDR : Answer Summary
UK citizens who entered Thailand on a visa exemption for 30 days can extend their stay by visiting an immigration office. Commonly required documents include a recent photo, passport front page, original and copy of the visa stamp page, completed TM30 form, and the extension application form (TM7). Specific requirements may vary by immigration office, and it may be beneficial to check ahead for any additional documents needed.