Did mine the other day very easy, didn't ask for it at immigration yesterday. Very quick at BKK immigration. We saw people that were sent back to the screens who hadn't done it.
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.