So this information from official Thai embassy is a incorrect???
-----
Visa exemption conditions:
Passport valid for at least six months beyond the date of arrival in Thailand.
Foreigners entering Thailand under the Tourist Visa Exemption Scheme must possess adequate cash of or equivalent to 20,000 Baht per person or 40,000 Baht per family.
Foreigners entering Thailand under the Tourist Visa Exemption Scheme must provide proof of onward travel (confirmed air, train, bus or boat tickets) to leave Thailand within 60 days of the arrival date.