@Colin ********
yes, but what I said is, the visa is only good for ONE entry (single entry visa class) so the visa itself will become invalid for further use after he entered Thailand. He then is in Thailand on a "90-days stay permit", and this stay permit can get extended for one year, if he fulfills the requirements. A visa cannot get extended. Buriram Immigration now uses the correct terminology, they don't "extend visas" any more. They fully correctly only extend "stay permits" 😎