Insurance only required when applying for e-visa
Non-Immigrant Type O (Visiting or staying with applicant's family resided in Thailand (more than 60 days) - single entry only)
Proof of relationship to a family in Thailand, e.g. a copy of marriage certificate / birth certificate / certificate of adoption
Personal details of a family in Thailand, e.g. ID card, Passport and the visa page or stay permit in Thailand
Proof of accommodation in Thailand e.g. hotel bookings, invitation letters from family/friends in Thailand
Financial evidence e.g. bank statements, proof of earnings, proof of sponsorship from a third party
Confirmation of legal residence in the UK or Ireland
Non-Immigrant Type O (Retirement (pensioner aged 50 or above with a state pension who wants to stay in Thailand for no longer than 90 days) - single entry only)
Financial evidence e.g. A copy of pension statement if the applicant is a pensioner, or a copy of 1-month bank statement showing your income from pension, or 3-month bank statement of at least £10,000
Confirmation of legal residence in the UK or Ireland. Copy of health insurance that covers COVID-19 related medical expenses, both inpatient and outpatient, no less than 100,000 USD for the whole period of your stay in Thailand.