What paperwork do I need to change from a retirement visa to a marriage visa in Thailand?

When changing from a retirement visa to a marriage visa in Thailand, the paperwork required may differ based on your gender. Specifically, a foreign woman married to a Thai man is not required to have 400,000 Baht in the bank or the equivalent monthly income, while the reverse is true for foreign men married to Thai women. It’s important to confirm the exact forms and checklist requirements with the immigration office.