Put 800K in your Thai bank account , take a statement , then remove it , depending who does it , they keep your passport for 35 days and repeat the same process to satisfy their friends at immigration
The stamps are all legit , their processes may not be
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.