Michael, &
@Mic****
, when you have a child with a thai woman out of wedlock you are not granted ANY parental rights as the father. It doesn't matter if your name is on the birth certificate, if you get a passport for that child in your country etc. You still have NO parental rights in thailand as the father. You have to go thru family court to get them granted. Without that you cannot use the child to secure a long term extension of stay inside the country at the immigration office.
That was one of the reasons I was telling them to get a 90 day Non-O at a thai consulate in another country and then get the 60 day family extensions too. The consulates do not require the decree from family court to issue a Non-O based on support of a half thai child.