I have not been keeping up to date with changes to Thailand entry... do you need any kind of electronic authorization right now, or can you enter with just a passport?
TLDR : Answer Summary
Currently, entry into Thailand may not require an electronic authorization depending on your nationality. As of now, the Electronic Travel Authorization (ETA) has been postponed. Citizens from over 90 countries can enter without a visa for stays up to 60 days.
THAILAND ELECTRONIC TRAVEL AUTHORIZATION (ETA)