There are many foreigners asking me how they get 100% guaranty for their legal actions. Thailand is like any other civilized country based on rules similar to Western Civil codes like that in Holland. Now Westerners wants to get the same illusion of guarantees. Better than in Europe here you can negotiate a lot more and build that way a relation with the contract party. The way I see the work of a lawyer is more like making a contract that reflexes the result of the negotiation and make that everyone has the same understanding of what will be agreed on. It is stupid to use a standard contract. That is what gave me a lot of work as a court mediator since nobody had the same understanding of the agreement. My advice is just hire somebody who understands law and still is capable of listening to the individual needs and puts that into understandable words.