Do additional funds in my Thai bank account for a visa extension need to show foreign transfer origin?

Tod Daniels, A quick question please about the banked 800k for over 50 extension.

I basically have the 800k in my Thai current account but I need to top up the account to keep it above 800k for my September renewal.

I'm having a little trouble in getting additional funds in the account and showing that they were a foreign transfer.

For the 800k seasoned funds, does additional money going into the account have to show that it came from abroad or is just 800k plus ok?

I've not seen anything written in the new rules to say it has to show foreign origin

Thanks.