The SA embassy in BKK doesn't authenticate anything, you'd have to send it to Pretoria to do it 🙈 but my understanding is that you only need your documents verified if you're doing a non b within Thailand, if you're going to Laos you should be chilled 👌🏾
Thank you Christine and Tod! Really appreciate the advice. My current tourist visa expires on the 26th so I'm thinking of doing an extension before the end of the week, and then attempting a non b straight after that (fingers crossed)!
Thanks Robert! I'll ask my employer what she thinks, thought I'd just find out whether CM's immigration office actually processes non B visas before I ask