Update on my previous post
For the Korat office Region 2 in the city:
Documents needed:
-Passport face page, visa page and pages with entry stamps since the last 180 days
-completed application form
-Some proof of income, in my case statements from the Thai bank for the last 3 months with highlight of incoming funds
15 minutes later I walked out with the Tax Identification Card, which has the TIN number on it.
Completed the document from the Belgian bank, made a scan of the card and sent all by email to the Belgian bank. Done..