Also, an addition of what Immigrations can do with looking up your passport. They can also tell if you're staying at any hotels and such. Funny story, My gf and I was at the immigrations office and the officer told my gf that I recently stayed at a hotel for 2 days, the exact name and location.
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.