yes. I got my letter within 3 hours, but i think maybe is my embassy not busy like others. I have applied 2 times for embassy letter, 1 in April 1 in July. Both also received original letter.
you just need to fill in the form with your personal details and the reason for extension. Actually the officer is quite busy, they no ask any questions.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.