To apply for an O visa you will have to submit the following:
- Fully completed visa application form
- Passport or travel document, valid for at least 18 months
- One (4 x 6 cm) passport photo, taken within the past six months
- Evidence of adequate finance
- Birth certificate
- Certificate of marriage (if applicable)
- Medical certification
- A copy of a bank statement showing a minimum of 800,000 Baht in your account