There were a few more expenses, getting the documents needed from the British embassy in Bangkok, translations, government stamps etc but the actual marriage certificate was ฿50 and thinking about it, that was probably for the plastic sleeve they put it in 😂
What you may have seen regarding not needing financial evidence because you’re a woman is likely to be for an extension of stay (processed inside Thailand, not at an embassy abroad) based on marriage to a Thai national. A foreign man married to a Thai woman does need to show finances, but a foreign woman married to a Thai man does not.
I’m not sure if you’re unmarried due to a particular
life choice, or you just haven’t got round to it, don’t think it’s necessary etc but for the future if you’re going to be living in Thailand it will certainly make your visa/residency issues a lot easier if you are married.