Osian Ledger ..actually wannikae is correct in my experience, when applying for the non o from outside of Thailand the thai embassy,well in UK ,only need to know you have the equivalent of
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0 baht, the time you have had it is irrelevant. Well for me that worked, gave them one statement dated the date of my application and I got my 90 day non o. It's only when extension of one year is made in Thailand that you need to show the timeline of funds and that is two months.