There have been many scams done by those using the internet for booking tourists wanting to visit Thailand. For this reason The Tourism Authority of Thailand (TAT) is now cracking down on these businesses with new laws.
Starting Dec. 1, 2012 any operation in the tourism industry from tour operator, hotel, guest house, B&B to guides and taxis will need to register with TAT and pay 100,000 Thai baht in escrow. This money will be held in case any of these business commit fraud or fail to deliver services promissed to clients. The money will then be paid to the unsatisfied clients and then the company who committed such act will no longer be able to do business in the tourism industry.
This is to protect the consumer so make sure before you book with a tour operator, hotel, guest house, B&B to guides and taxis make sure they have a TAT license. The licensed number should be posted on their web site or in their email. The license number will be 2 numbers then a dash then 5 more numbers. The TAT now has a task force in place to monitor search engines and social web sites such as trip advisor to find those doing internet booking. If they are not registered with TAT they will be fined and shut down.
Make sure you book only with licensed operators as you might pay now and when you come to Thailand they might be shut down by TAT or do not want to pay the 100,000 escrow fee, close their business or taxi service and you lose the money you paid.
Be safe and have fun in Thailand,