As already mentioned in a thread before, I lost passport containing my non-immigrant visa O A.
Renewing this visa is a bureaucratic nightmare in my country, so TV members advised me to apply
for the non-immigrant O visa, and while in THailand convert it to the orginal O A; as this would be the most appropiate way to avoid horrendous bureaucratic BS>
My questions to this matter are:
What is the formal or even practical difference between a non-immigrant visa O and the one O A?