What are the acceptable forms of evidence for monthly income when applying for a Thailand marriage visa?

When applying for a marriage visa in Thailand, acceptable evidence of monthly income must be documented through transfers made from abroad into a Thai bank account. The applicant must transfer a minimum of 40,000 baht each month for at least 12 months, ensuring the account is solely in the applicant's name. Since the UK embassy stopped providing affidavits of income in 2019, it's crucial to keep the evidence of these transactions clear and to account for exchange rate fluctuations. Some immigration offices may also require additional documentation from pension providers or restrict the income method to applicants who have maintained their account with a 400,000 baht deposit. It is essential to check with the specific immigration office for their requirements regarding proof of income.