What documentation do I need to obtain a tourist visa to get married in Thailand?

To obtain a tourist visa for marrying a Thai spouse, it's advisable to have documentation that supports your intention to marry, such as an appointment confirmation for a civil ceremony in Thailand and a letter from your embassy stating that you are not currently married, which should also be translated into Thai. Additionally, having sufficient funds (around 20,000 Baht), hotel bookings, and a return flight ticket can assist in ensuring the visa process goes smoothly.