Can I use a combination of bank funds and monthly transfers for my retirement visa extension in Thailand?

The ability to use the combination method is still written into the Police Order that lists ways you can meet the proof of funds

The banked portion of the money needs to be seasoned the same as if you were using all banked money, and the monthly transfers need to be each month, every month for the previous 12 months (they will take the month that has the least amount transferred in and use that as the incoming amount each month)

You need the regular bank letter, the year transaction history (those two meet the proof of funds for the banked money) AND then you need a separate letter listing your monthly incoming transfers for the previous 12 months.

NOTE: there are some offices and officers that just refuse to allow people to apply for their year extension using the combination method. This is not gonna turn into a thread about which ones do or don't. GO to your immigration office well before your extension is due, see what they say.

This is the combo-method english and thai from the police order that is in effect.