What are the consequences if a Thai airport officer denies your visa upon arrival?

You will be held in immigration detention in the Airport till you book your next flight from which country you arrived from.

You also have to book the same airline as you came into Thailand .

Sent back to where you come from

If the Thai Immigration Officer denies you entry into Thailand, likely will be sent back to the City you flew from to Thailand, or your home country. At your expense.

You have asked two times in recent days about your planned visit to Thailand.

Moderators both times replied to you using PM messages. It's possible you have not seen the replies.

I will post them FYI.

In my opinion, if you don't receive the Thai SETV single entry tourist visa which you have applied for, as you are eligible for visa exempt entry into Thailand, with your limited visits to Thailand, you will be allowed in as Visa Exempt Entry. Given 60 days on arrival Plus one 30 day extension of stay available for 1900 Thai baht at your local Thai Immigration office.

Have PROOF of your flight ✈️ departing Thailand within the 89 days from your arrival date...along with the address of where you will be living during the first week of your arrival, and the equivalent of 20,000 Thai baht in CASH to show Thai Immigration Officers if you are asked.

Safe travels... enjoy your holidays in Thailand.

Next flight home at your expense

Next available flight back home

You go home son..