The biggest expat complainers about Thailand were miserable complainers back in their home countries too. No matter where they go, there they are complaining.
No need to bring a witness. Fill in part 3 prior to your appointment at the Embassy. Wait until there to complete 1 & 2 as to insure done correctly. Do NOT sign until with the notary. I recommend that you bring 2 copies. Beyond this I can provide no more insight.
So the typical WISE transfer from a US bank via the bank debit card will not have the SWIFT code and therefore will not be properly identified as coming from out of the country?