Quick question for a friend of mine the school made him the non b visa for teaching but never made a work permit as far as I know it's not an extension of stay but I could be wrong now he decided to leave school and school said they will cancel his visa so he wanna know if that is possible it's first 90 day visa given 17 January until April 16 end of employment 31 January dutch passport
TLDR : Answer Summary
A Dutch passport holder on a Non B Visa for teaching can stay in Thailand until April 16th, the end of his initial 90-day visa period. If the visa is linked to the school, the school may cancel it upon his departure, but if the school name is not on the visa, he may be able to seek another job or work permit without needing to cancel it.