I've just received a single-entry non-imm-O visa, based on pension income, which I plan to use to visit for 90 days. I then plan to return to UK and possibly obtain a multi-entry non-imm-O visa for next year. However, I read here that it may be possible to extend the single-entry visa for a year whilst still in Thailand. What are the options?
TLDR : Answer Summary
The user has a single-entry non-immigrant O visa based on pension income, valid for 90 days. They inquire about extending it while in Thailand. The response outlines that an extension is possible through local immigration offices, requiring either proof of financial stability or a letter from one's consulate indicating a monthly income. The yearly extension fee is 1900 baht, and a re-entry permit may also be necessary depending on future travel plans.