Thanks. I booked an appointment 30 days prior. Applied on a Monday and got Wednesday. I submitted signed copies by the mother child's birth certificate and house registration and mother signed copies of Thai Id and house registration. I add a copy of my bank account and it was returned. I talked to immigration about extending to 1 yr. They said I need 400k baht in the bank and legitimization of me as the father of the child since we are not married by the mother. So went District office , child me and wife, with 2 witnesses, interviewed, they asked for the translation of my name in Thai and my mother and father's names also, Took not more than 2 hours.