How do I prove my income of 40,000 Baht per month for a marriage visa in Thailand?

To prove an income of 40,000 Baht per month for a marriage visa in Thailand, you have several options depending on your country of origin. You can either provide an Income Affidavit from your Embassy, or if your embassy does not issue such affidavits, you must show at least 12 months of monthly foreign deposits of a minimum of 40,000 Baht into a Thai bank account in your name before your application date. Alternatively, you can also prove your income through employment in Thailand with a minimum salary of 40,000 Baht per month, supported by a work permit and tax documentation. Note that some embassies have stopped issuing affidavits, thereby requiring applicants to use bank deposit proof instead.