@Martin *************
you're still wrong. The 9th November date has zero to do with his allowed stay date. It's simply when his visa needs to be used by to enter Thailand. It's the equivalent of saying his gift certificate to enter Disneyland must be redeemed at the box office by 9th November. It doesn't have anything to do with calculating when he can stay till. For example, he might enter Thailand today on his visa that is valid through 9th November, which would make his permission to stay end on 14 October. So he would need to go to immigration to extend it before 14 October, not before 9 November, which grants a stay of 30 more days until 13 November, which still would not be enough for him to stay until 26 November as he wants to do. On the other hand, if he entered on 27 September, even though the visa was valid till 9 November, he is still stamped in for 60 days, allowing him to stay until 26 November without needing any extension.