@Derry ********
your Thai business registration papers. Affidavit + articles of organization + registered business functions + shareholders list.
You can grab it online on the DBD Go website for about 500THB (if you don’t have one that’s less than 6 months old). If you have a copy that was issued less than 6 months ago, you can send them that one (just make sure the QR code on the bottom is visible).