What are the requirements for obtaining a Non-O visa to support my half Thai-American son in Thailand?

To obtain a Non-O visa supporting your half Thai-American son in Thailand, ensure your name is on his birth certificate and that you are legally recognized as his father. You will need to present 400,000 THB in a Thai bank account, the mother’s ID, and relevant documentation like the family book (tambien baan) for both the mother and child. Note that specific requirements may vary by location, so check with your local immigration office for additional documents that may be needed.