@อ้วน ********
, your name ends up on the birth certificate in the same way it ends up on your passport and driving licence, you put it on the form! Hospitals do what they do, and that isn’t registering births, deaths and marriages, that’s another place. I assume you have a Thai girlfriend or wife so she will know where to go, it’s a fairly common thing to do. And yes I have a Son born in Thailand to a Thai wife, but as it’s her country she sorted everything out, I just signed where she pointed.