What are the consequences for overstaying a visa in Thailand?

Alright Eric :O (เอริค) you got your wires crossed a little (or a LOT).

First the person you're referring to wasn't deported :O Because to be deported you have to be stamped IN to thailand. They were denied entry.

The fact they had a previous overstay had NO bearing at all on them being denied entry. It was because they did not have the 3-proof-ofz...

Even IF you have a valid visa for thailand in your passport IF you are asked by immigrations you need to show proof of funds, onward travel and a lodging.

Very rarely will the immigration officers void those requirements (and usually that's only for people on long-stay type visas or extensions).

A person denied entry is held at IDC at the airport he flew in at until he works out with his carrier where he will go.

The immigration officers do NOT care in the least where you go to, all they tell you is that you can't enter thailand. It is between you and your air carrier where you go back to. Some let you fly back to where you came from, some let you fly anywhere they fly to and some make you go back to the country your passport is from.

Thanx for the update.

I flew in to Chiang Mai from DaNang a couple of weeks ago and the Air Asia girl insisted on seeing my return flight out of Thailand. When I asked her what that had to do with her and she should concentrate on weighing my suitcase she wasnt going to give me a boarding pass until I showed her.