If anyone is interested, here is a copy of the documents required list from Chaengwattana for extension on reason of Thai wife, received May 2025. Document is dated October 2023.
PS: Last year information counter told me to get the form from section L. Yesterday section L told me to get the form from Information counter (which is much better as it's much faster).
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TLDR : Answer Summary
This post discusses the documents required for a visa extension due to marriage with a Thai citizen at Chaengwattana immigration office. The information is dated October 2023, with suggestions to check with local offices for specific requirements.
Everyone pay attention ๐ฎ this is to get a yearly extension based on marriage to a thai at the main immigration office here in Bangkok at the government complex on Chaengwattana Road (In section L-1) ๐
Your office might or might not require the same thing and that's why we recommend you slog on out to your office and get their list o' documents for what ever visa/extension you're getting well before you're going to attempt it ๐