I've seen in some forums online that a 30-day stamp can now be extended by 30 days for a 1,900 baht fee at Chaeng Watthana. used to be only visas could be extended by 30 days; entry stamps by 7 days. What's the real deal?

The 30 day Visa Exempt entry can be extended at any Immigration Office by 30 days.

1,900 Baht fee.

thank you. what sort of documentation is needed? same forms as for visa extension?

Yes. TM7

OK. one final question. Does the extension count as an additional stamp? Eg, will I risk getting hassled if I extend 30 days, then fly out and back in without a visa--will they give me another 30-day stamp? My understanding is that two consecutive 30-day stamp entries are permissible; after that it could get dicey.

thank you