What is the process for extending a marriage visa in Thailand based on an amnesty situation?

This post discusses a recent experience with renewing a marriage visa in Thailand based on an amnesty provision. The original poster successfully obtained a one-year extension without the need for a wife or bank book, which has been confirmed by comments detailing that many immigration offices do not require financial documentation during the extension process. There is also discussion about variations in requirements across different regions in Thailand, highlighting the difference in practices between immigration offices.