Hi,
I am planning on being in thailand for 60 days, I was under the impression, up till this point, that my passport would be sufficient and i would be able to extend my stay for a nominal fee? Do i need to do something before i leave the United states?
Thanks,

You can get a Tourist Visa from Thai Consul before you leave US and you will get a 60 day stamp when you arrive which can be extended for 30 days.
Or.. if arriving by air with no visa you will receive a 30 day entry stamp which you can extend for 15 days.
.....if arriving by land with no visa you will receive a 15 day entry stamp which can be extended for 7 days.
The logical thing to do is get a Tourist Visa before you come to Thailand.

"that my passport would be sufficient and i would be able to extend my stay for a nominal fee? Do i need to do something before i leave the United '
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Not nominal fee , expensive 1900 baht.

Wandabug's post also clears up that matter in reply # 665 where it was suggested that the 15 day stamp couldn't be extended. It was always possible to extend it.
Recent Thai Immigration amendments include:
15 days visa extension at the border as opposed to the usual 30 days...this has been the case since December 2008
**2-month deposit term for required funds for Non Immigrant Visas i.e. Retirement and Marriage Visas when applying the first time; 3 month deposit term is required when renewing the visas
**Jail term for those who overstayed in Thailand for 42 days and above.
For more thailand visas updates see:
http://www.siam-visas.com/

***15 days visa extension at the border as opposed to the usual 30 days...this has been the case since December 2008
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The 15 days is not a visa , thats the stamp you are given if arriving without a visa.
Siam-visas.com is a new competitor to Thaivisa.com ? .
Siam-visas.com is a new competitor to Thaivisa.com ?
No, it's a bunch of "Thai lawyers and foreign business consultants" who are selling something.
Reported as spam.
Non-commercial advice here:
Thai Tourist Visa - Do I Need One & How To Get It?
(something to link back to instead of answering the same questions over and over)
=)
So............ any recent experiences of arriving into Thailand, by flight, with UK passport on one way ticket.... I'm flying in from India....
I plan to fly in November so is it better to arrange visa in advance in India?
I really don't want to book my onward travel yet...
i flew into thailand twice (july and august) on one way tickets with uk passport. no questions asked either time, 30 day visa granted with no problems.
Only was a problem the very 1st time (in april) when quantas made a big issue out of it and insisted i had a flight out of there. from what i can gather it only seems to be a problem when u fly in from the uk. it's not the thai immigration people, its the airlines. apparently they are just covering their backs, but seems weird when the thai's really don't give a toss...