Can my family apply for dependent visas in Korea or Taiwan using my DTV visa number obtained in Vietnam?

I applied for mine in my home country in South America, and two months later I applied for my spouse in Hanoi, since we were already in Southeast Asia. I had to submit an updated bank statement, and everything went fine.

Anyway, I agree with James that it’s better to apply shortly after the main applicant, not only because the approval chances for dependents seem higher, but also to avoid any questions or possible rule changes regarding the amount you need to show in the bank.

Are you the American with which has another post on the forum?

Not recommended. Apply for family members immediately after the primary adults application was approved. The Thai Embassy or Consulate Staff will recognize that they ALREADY have approved One member of the family.

Yes