What are the steps and documents required to obtain a guardian visa in Thailand for a child in an international nursery?

To obtain a guardian visa in Thailand for a child attending an international nursery, you typically need to apply outside the country at an embassy or consulate with documentation from the school. The application usually involves obtaining a Non O visa based on guardianship. Additionally, applicants must show proof of having at least 500,000 baht in a personal Thai bank account, deposited at least a month before applying. Once the Non O visa is about to expire, an extension can be sought to align it with the child's visa. The exact requirements and processes can vary by immigration office, and it is advised to check requirements at your local office.