A foreigner is entitled to adopt a child in Thailand only When he/she is fully 25 and the child is 15 years younger than he/she. It is easy if the child is his wife But if not he may need to receive approval from the Thai authorities because the society is concerned about the child welfare. You may take the child to adopt it According to your law. The adoption and the termination must be registered with the Thai authorities or the authorities of the foreign country concerned with the consent of the child parents in case of a minor child. The adopted child has the same right as a legitimate child, particular to claim for maintenance from its adopting parent/s during childhood and is entitled to succeed its parents heritage