Can parents apply for a non-O guardian visa and children for an ED visa in Thailand without leaving the country?

Parents of children enrolled in international schools in Thailand are typically eligible to apply for a non-O guardian visa. However, whether this can be done without leaving the country depends on the parent's current visa status and the immigration office's policies. Generally, particularly in cases of overstaying or under specific visa restrictions, parents may need to exit Thailand to obtain the necessary visas. Children can receive an ED visa as well, but the school usually requires the parent to have an appropriate visa before proceeding. There are exceptions, such as potential support from embassies, especially in light of unique situations like COVID-19.