I've been in Thailand for two years and I'm returning next week. At the time I went, health insurance was required and we needed to get an authorization to enter the country through the embassy website.
Do these bureaucracies still exist?
Country of origin: Brazil
TLDR : Answer Summary
The requirement for health insurance and entry authorizations, such as the Thailand Pass, has been lifted for Brazilian citizens as of now. Travelers can enter Thailand without a visa for up to 90 days due to a bilateral agreement. However, while health insurance isn't mandatory, it is strongly advised. Additionally, proof of yellow fever vaccination may be required upon entry.