Could be you need a police report. On the other hand it's registered in their system. There also is an app. Think still in Thai language but after registering you have some Icons. Ask Thai or google translate. The app is known and accepted by police.
Sorry as mentioned. The year extension in Thailand, is that 800k฿ in y'r Thai bankaccount indeed, but the 12 monthly transfers of 65k฿ is not possible when the French Embassy still hands out the income statement.
65k฿ option is only possible (2nd year extension indeed), if y'r passport is from some countries as US, UK, Australia, Canada en thought 1 or 2 more.
Think depends on how long ago. 20 years ago it was not so strict as now. Opened a bank account with no visa. And they where happy when I put in the money. So violating the law ? Think there is no real law for opening a bank account. Bank regulations ? Maybe now but sure not 15 / 20 years ago. Bank account opening rules where, and think they still are, on their web sites for a foreigner....