@Peter ******
I don't run a visa agency !!!
...I am a Moderator on Thai Visa Advice forum.
...I don't have any affiliation with Thai Visa Centre in Bangkok.
...Yes they own Thai Visa Advice...but we don't allow any discussion of using any Thai Visa Agent on the forum. As the Thai Visa Advice forum " is for those who are doing it yourself" forum.
...Please get your facts straight before making such a statement about my volunteer services provided on several Facebook forums...preCovid, during COVID-19 and now as Thailand has reopened.
I suggest you ask the Thai Embassy or Consulate where you are going to make your application for the DTV visa..
Your question about the need to stay in the country where you make application until you get the DTV Visa answer approved or denied. That way you will know what that country's requirement is about the need to stay.
I have seen such a requirement posted on several Thai Embassies or Consulates websites.
Sorry if I have not pleased you with my answers. Take care 🤗