Transiting through Thailand’s airports exceeding 12 hours before proceeding to the third country of destination or returning to home country
If you need to re-check in for your trip, hence need to pass an immigration point, you must apply for a transit visa though the transit is less than 12 hours.
Documents required
Passport or travel document with validity of not less than 6 months prior to departure and its copy
Three completed visa application forms
Three recent passport-sized photographs of the applicant
Proof of residence in Nepal (for non-Nepali passport holders only)
A copy of confirmed airline ticket indicating the date of arrival to Thailand and departure from Thailand to the third country (and for applicants applying for double entries visa, a copy of an airline ticket showing the second entry to Thailand)
Evidence of adequate finance, e.g. an updated 6-month bank statement with a minimum blance of THB 10,000 (NPR 40,000) per person and THB 20,000 (NPR 80,000) per family
Visa of a third country in a passport or travel document